An ambassador is a diplomatic representative of a ruler, president, head of state or government of the highest formal class, or, by analogy, a non-diplomatic representative or advocate/promoter for a charity, cause, cultural possession of a country or region (such as the arts, music, or tourism) or can also be applied for a business with a global, regional or local scope that is well-defined.

Generally relative to individuals and those who use the term ambassador as a pre-nominal title

Pre-nominal letters

Pre-nominal letters are a title which is placed before the name of a person as distinct from a post-nominal title which is placed after the name. Examples of pre-nominal titles, for instance professional titles include: Doctor, Captain, Eur Ing , Ir and Professor; whilst other common social titles...

, honorific

Honorific

An honorific is a word or expression with connotations conveying esteem or respect when used in addressing or referring to a person. Sometimes, the term is used not quite correctly to refer to an honorary title...

 title, job title, or professional title

Title

A title is a prefix or suffix added to someone's name to signify either veneration, an official position or a professional or academic qualification. In some languages, titles may even be inserted between a first and last name...

 refer to the following uses:

• Ambassador
  Ambassador
  An ambassador is the highest ranking diplomat who represents a nation and is usually accredited to a foreign sovereign or government, or to an international organization....
  
  , formally a designated representative of a state, country, non-governmental or nonprofit organization, multilateral organization, political party or body politic that has been selected by the leading figure of such and credentialed with a personal letter of credence
  Letter of Credence
  A letter of credence is a formal letter usually sent by one head of state to another that formally grants diplomatic accreditation to a named individual to be their ambassador in the country of the head of state receiving the letter...
  
   from the ruler, head of state
  Head of State
  A head of state is the individual that serves as the chief public representative of a monarchy, republic, federation, commonwealth or other kind of state. His or her role generally includes legitimizing the state and exercising the political powers, functions, and duties granted to the head of...
  
  , or organizational figurehead introducing the designated ambassador as their designated emissary or envoy for their diplomatic mission
  Diplomatic mission
  A diplomatic mission is a group of people from one state or an international inter-governmental organisation present in another state to represent the sending state/organisation in the receiving state...
  
   to those who shall receive the ambassador.
• Ambassador-at-Large
  Ambassador-at-large
  An ambassador-at-large is a Diplomat of the highest rank or a Minister who is accredited to represent his country internationally.Unlike an ambassador-in-residence who is usually limited to a country and/or embassy, the ambassador-at-large is entrusted to operate in several usually neighboring...
  
  , a special ambassador assigned relative to a cause or issue who is assigned non-specifically without an embassy. Sometimes referred to a roving ambassador.
• Brand ambassador
  Brand ambassador
  A Brand Ambassador is a person employed by a company to be the sales rep and physical representative of the company with respect to sales and marketing. The Brand Ambassador is meant to embody the corporate image in appearance, demeanor, values, and ethics....
  
  , companies use ambassadors who may promote products or services professionally to clients or the public in general, individuals usually also demonstrate or give away samples of product.
• Citizen ambassador
  Citizen diplomacy
  Citizen diplomacy is the political concept of average citizens engaging as representatives of a country or cause either inadvertently or by design. Citizen diplomacy may take place when official channels are not reliable or desirable; for instance, if two countries do not formally recognize each...
  
  
• Cultural ambassador
  Cultural diplomacy
  Cultural diplomacy has existed as a practice for centuries. Explorers, travelers, teachers and artists can be all considered examples of informal ambassadors or early cultural diplomats...
  
  
• Extraordinary ambassador
• Facebook ambassador, a colloquial term that has become a social networking idiom and neologism popularized by Globcal International
  Globcal International
  Globcal International is a non-profit cooperative made up of individual social network experts, platform developers, event organizers, motivational speakers, foreign-affairs students, qualified as citizen diplomats located in countries all over the world that are all connected via social media...
  
   in an open citizen and public diplomacy program that includes many types of ambassadors that are involved in social enterprise development and social mission driven organizations dedicated to themes like the environment, humanitarian aid, fair-trade and the eradication of poverty.
• Goodwill ambassador
  Goodwill Ambassador
  Goodwill Ambassador is a collective term sometimes used as a substitute honorific title or a title of honor for an Ambassador of Goodwill; but, most appropriately for a generic recognition, it is a job position or description that is usually indicated following the name of the individual recognized...
  
  , non-diplomatic and semi-diplomatic individuals sometimes authorized by heads of state; but more often designated by international non-governmental organizations that promote causes most often without remuneration. Most often used to honor celebrities from all areas and take advantage of their popularity or social connections to promote causes that benefit society in general.
• Good neighbor ambassador
  Good Neighbor
  Good Neighbor A.K.A The Killer Next Door is a 2001 thriller with Billy Dee Williams, Danica McKeller, Tobin Bell.-Cast:* Billy Dee Williams as Sgt. Paul Davidson.* Danica McKellar as Molly Wright.* Tobin Bell as Geoffrey Martin....
  
  
• Ordinary ambassador
• Peace ambassador - see Peacemaker (disambiguation)
  Peacemaker (disambiguation)
  Peacemaker or The Peacemaker may refer to:-Individuals and groups:* UN Peacemaker, project of the UN to support international peacemakers and mediators...
  
  
• People to People Student Ambassador
  People to People Student Ambassador Program
  The People to People Student Ambassador Program is a travel service based in Spokane, Washington offering domestic and international travel opportunities to middle and high school students. The group was founded in 1956 and reincorporated in 1995. Since its founding, nearly half a million...
  
  , offers educational international travel services to elementary, middle, and high school students. Started by Dwight D. Eisenhower in 1956. They also have the Sports Ambassador Program, and Ambassador Programs for adults.
• Professional ambassador, individuals representing companies, corporations as a host or hostess at an event that can provide complimentary accommodation and fully represent the interests of the corporation, celebrities are sometimes used in this role but more often local successful individuals fill these roles.
• Roving ambassador - see Ambassador at-Large
• Student ambassador, a designated representative of their school or university, sometimes representing student groups or departments of education therein.
• Wikipedia ambassador, individual Wikipedia/Wikimedia editors working on multilingual projects and cross-language issues.

Ambassador may also refer to:

In the arts:

• The Ambassadors
  The Ambassadors
  The Ambassadors is a 1903 novel by Henry James, originally published as a serial in the North American Review . This dark comedy, one of the masterpieces of James's final period, follows the trip of protagonist Lewis Lambert Strether to Europe in pursuit of Chad, his widowed fiancée's supposedly...
  
  , a novel by Henry James
• The Ambassadors (Holbein)
  The Ambassadors (Holbein)
  The Ambassadors is a painting by Hans Holbein the Younger in the National Gallery, London. As well as being a double portrait, the painting contains a still life of several meticulously rendered objects, the meaning of which is the cause of much debate...
  
  , a painting by Hans Holbein the Younger
• The Ambassador (comic strip)
  The Ambassador (comic strip)
  The Ambassador is a short-lived newspaper comic strip created by Otto Soglow in 1933.In 1931, Soglow introduced his Little King character in The New Yorker. William Randolph Hearst was determined to see The Little King syndicated by his own King Features Syndicate, but contractual obligations...
  
  , a comic strip by Otto Soglow

In entertainment:

• The Ambassador (film)
  The Ambassador (film)
  The Ambassador is a 1984 American thriller film directed by J. Lee Thompson and stars Robert Mitchum, Ellen Burstyn and Rock Hudson. The political thriller was based on the 1974 crime novel 52 Pick Up by Elmore Leonard...
  
  , a 1984 political thriller
• Ambassador (musical)
  Ambassador (musical)
  Ambassador is a musical with a book by Don Ettlinger and Anna Marie Barlow, lyrics by Hal Hackady, and music by Don Gohman. It is based on the 1903 Henry James novel The Ambassadors....
  
  , a 1971 adaptation of the Henry James novel
• The Ambassador (TV series)
• The Saints (1960s band)
  The Saints (1960s band)
  The Saints were an instrumental band that worked for record producer Joe Meek.-Career:The band were made up of Tab Martin , Roy Phillips , and drummer Ricky Winter...
  
  , a band also known as The Ambassadors
• Ambassador (album)
  Ambassador (album)
  Ambassador is the title of the first full length album released by the Canadian alternative country band Elliott Brood. It was released in October 2005 on the independent music label Six Shooter Records...
  
  , by the band Elliott Brood
• The Ambassador (William Branch)
  The Ambassador (William Branch)
  William “Duce” Branch a.k.a. “The Ambassador” or “Ambassador” is a Christian hip-hop artist who has recorded both independently and as a founding member of the group The Cross Movement. Branch is the former president of Cross Movement Ministries...
  
  , a Christian rapper

Places:

• Ambassador Theatre (disambiguation), a number of venues
• Ambassador Hotel (Los Angeles)
• Ambassador Hotel (San Francisco)
• Ambassador Auditorium
  Ambassador Auditorium
  Ambassador Auditorium is located on the historic Ambassador College campus in Pasadena, California, USA. It was built under the guidance of Herbert W...
  
   in Pasadena, California
• Ambassador College
  Ambassador College
  Ambassador College was a four-year, liberal arts college run by the Worldwide Church of God. The college was established in 1947 in Pasadena, California by radio evangelist Herbert W. Armstrong, leader of what was then the Radio Church of God, later renamed the Worldwide Church of God...
  
   (defunct) in Pasadena, California
• The Ambassador Bridge
  Ambassador Bridge
  The Ambassador Bridge is a suspension bridge that connects Detroit, Michigan, in the United States, with Windsor, Ontario, in Canada. It is the busiest international border crossing in North America in terms of trade volume: more than 25 percent of all merchandise trade between the United States...
  
   between Detroit, Michigan and Windsor, Ontario

Automobiles:

• AMC Ambassador
  AMC Ambassador
  - 1958 :American Motors planned to produce a stretched a wheelbase version of the Rambler platform for Nash dealers to be the new Nash Ambassador, and another for Hudson dealers...
  
  , the top-of-the-line models produced by American Motors Corporation (AMC) from 1958 until 1974
• Nash Ambassador
  Nash Ambassador
  Ambassador was the model name applied to the senior line of Nash automobiles from 1932 until 1957. From 1958 until the end of the 1974 model year, the Ambassador was the product of American Motors Corporation , which continued to use the Ambassador model name on its top-of-the-line models...
  
  , first used in 1927, the model name was applied to the senior line of Nash automobiles from 1932 until 1957
• Austin Ambassador
  Austin Ambassador
  The Austin Ambassador was a medium-to-large hatchback car model introduced by British Leyland in 1982. The vehicle was a heavily updated version of the Princess, an ageing model that had lacked a hatchback...
  
  , a hatchback car model marketed by British Leyland from 1982 to 1984
• Hindustan Ambassador
  Hindustan Ambassador
  The Hindustan Ambassador is a car manufactured by Hindustan Motors of India. It has been in production since 1958 with few modifications or changes and is based on the Morris Oxford III model, first made by the Morris Motor Company at Cowley, Oxford in the United Kingdom from 1956 to 1959.Despite...
  
  , a car manufactured by Hindustan Motors of India since 1958 with few modifications or changes
• Yellow Cab Ambassador
  Yellow Cab Ambassador
  Ambassador was an automobile produced by the Yellow Cab Manufacturing Company of Chicago, Illinois, U.S., between 1921 and 1925.- History :Initially sold for use as a taxicab, the Model D-1 was introduced as a "drive-yourself" model in 1924....
  
  , vehicles sold for use as a taxi from 1921 until 1925 when the manufacturer was taken over by General Motors

Other:

• Ambassador (motorcycles), made by a British manufacturer
• Airspeed Ambassador
  Airspeed Ambassador
  The Airspeed AS.57 Ambassador was a British twin piston engined airliner that first flew on 10 July 1947 and served in small numbers through the 1950s and 1960s.-Design and development:...
  
  , a British airliner
• BT Ambassador
  BT Ambassador
  The BT Ambassador is a telephone private branch exchange switchboard. Manufactured for BT by GEC, it was discontinued in 1991. There was a larger version called Senator. Both systems used proprietary phones, allowed direct access to outside lines , had an intercom facility and allowed basic call...
  
  , a telephone switchboard PBX
• The Ambassador class starship in the fictional Star Trek universe
• Ambassador (train), a named train of the Baltimore and Ohio Railroad, a Second World War minesweeper
• Ambassador (clipper)
  Ambassador (clipper)
  Ambassador was a British Tea Clipper.She was a composite clipper, built with wooden planking over an iron skeleton and was Lund's first tea clipper....
  
  , a British tea clipper, one of the last composite ships
• Berkhof Ambassador
  Berkhof Ambassador
  The Berkhof Ambassador is a low-entry bus produced by the Dutch bus manufacturer VDL Berkhof. The section between the front and rear door are at the same height. The seats at the very rear are a bit higher, and can be reached by using stairs....
  
  , a Dutch bus from the company Berkhof