In music

Music

Music is an art form whose medium is sound and silence. Its common elements are pitch , rhythm , dynamics, and the sonic qualities of timbre and texture...

, a horn section can refer to several groups of musician

Musician

A musician is an artist who plays a musical instrument. It may or may not be the person's profession. Musicians can be classified by their roles in performing music and writing music.Also....* A person who makes music a profession....

s. It can refer to the musicians in a symphony orchestra who play the horn

Horn (instrument)

The horn is a brass instrument consisting of about of tubing wrapped into a coil with a flared bell. A musician who plays the horn is called a horn player ....

 (also known as the French horn). In a British-style brass band it refers to the tenor horn

Alto horn

The alto horn is a brass instrument pitched in E...

 players. In popular music, it can also refer to a small group of wind instrument

Wind instrument

A wind instrument is a musical instrument that contains some type of resonator , in which a column of air is set into vibration by the player blowing into a mouthpiece set at the end of the resonator. The pitch of the vibration is determined by the length of the tube and by manual modifications of...

alists who augment a band. The composition of these groups can vary, and they are used with bands of a variety of genres.
The horn section is the group of symphonic musicians who play the horn.