An accompaniment is an additional part of any kind that is less important than another, which it serves to support and enhance. The piano is often used to provide an accompaniment to a solo singer. In works for, say, violin and piano the role may be swapped between the instruments.

1[countable, uncountable] accompaniment (to something) music that is played to support singing or another instrument traditional songs with piano accompaniment2[countable] accompaniment (to something) [..]

1744 in music (1731 as a term in heraldry), from French accompagnement (13c.), from accompagner (see accompany).

an event or situation that happens at the same time as or in connection with another a musical part (vocal or instrumental) that supports or provides background for other musical parts complement: som [..]

n. A subordinate part or parts, enriching or supporting the leading part.

Accompaniment refers to anything that accompanies something else. It can be an event or situation that happens at the same time as or in connection with another.

(n) an event or situation that happens at the same time as or in connection with another(n) a musical part (vocal or instrumental) that supports or provides background for other musical parts(n) somet [..]

The part of a piece of music or section of an instrument that plays a subordinate part to the more prominent melody and countermelody sections. * German: Begleitung.

subordinate harmonic and/or rhythmic material supporting a principal melody.

The music that supports the melody.

a vocal or instrumental part that supports and enhances another musical part, often a solo. For example, a piano is often used to provide an accompaniment for a solo singer or an instrument such as a [..]

 The subordinate material or voices that support a melody.

music and/or a rhythm that supports the main melody, such as a guitar being strummed while someone is singing, or the left hand on a piano playing certain notes over and over while the right hand plays a melody or improvises. Most accompaniments are grooves of one kind or another.

Music that is played as background to a solo singer or lead instrumentalist

An accompaniment is the music which supports the main singer or player.

the part of a musical “texture” that plays a supportive role usually in order to accompany a “melody”. See also: “melody”, “texture”, “homophonic texture”.

 An advocate will go with you to criminal court proceedings, protection from abuse hearings, media, medical, and/or police interviews.

the subordinate music that supports the principal voice or instrument in a piece of music.

music that provides support for the melody.