The Enterprise or USS Enterprise (often referred to as the "Starship Enterprise") is the name of several fictional starship

Starship

A starship or interstellar spacecraft is a theoretical spacecraft designed for traveling between the stars, as opposed to a vehicle designed for orbital spaceflight or interplanetary travel....

s, some of which are the focal point for various television series and films in the Star Trek

Star Trek

Star Trek is an American science fiction entertainment franchise created by Gene Roddenberry. The core of Star Trek is its six television series: The Original Series, The Animated Series, The Next Generation, Deep Space Nine, Voyager, and Enterprise...

 franchise created by Gene Roddenberry

Gene Roddenberry

Eugene Wesley "Gene" Roddenberry was an American television screenwriter, producer and futurist, best known for creating the American science fiction series Star Trek. Born in El Paso, Texas, Roddenberry grew up in Los Angeles, California where his father worked as a police officer...

. It is considered a name of legacy in the fleet. The majority of these vessels share "NCC-1701" as part of their registry, with later ships appending a letter to the registry to differentiate them.
The name Enterprise comes from a long series of ship

Ship

Since the end of the age of sail a ship has been any large buoyant marine vessel. Ships are generally distinguished from boats based on size and cargo or passenger capacity. Ships are used on lakes, seas, and rivers for a variety of activities, such as the transport of people or goods, fishing,...

s.