orchestra

noun

or·​ches·​tra ˈȯr-kə-strə 

-ˌke-

1

a

: the circular space used by the chorus in front of the proscenium in an ancient Greek theater

b

: a corresponding semicircular space in a Roman theater used for seating important persons

2

a

: the space in front of the stage in a modern theater that is used by an orchestra

b

: the forward section of seats on the main floor of a theater

c

: the main floor of a theater

3

: a group of musicians including especially string players organized to perform ensemble music compare band

Synonyms of orchestra

• symphony
• philharmonic

Examples of orchestra in a Sentence

He plays violin in the school orchestra.

the orchestra will be performing a selection of Beethoven pieces tomorrow night

Recent Examples on the Web

Conductor auditions The Arkansas Symphony Orchestra will hold auditions for an associate conductor/youth orchestra conductor during May. —Eric E. Harrison, Arkansas Online, 22 Apr. 2026

Through orchestra, chamber music, and even haphazard improv with friends, music has acted as a bridge to understanding others and continuing to explore and learn with them. —Heide Janssen, Oc Register, 19 Apr. 2026

The show operates a remote pit, meaning a majority of the musicians playing the music live are not in the theatre or under the stage in the traditional orchestra pit. —Dillon Thomas, CBS News, 17 Apr. 2026

On May 2, Lee is to appear at the annual Icheon Young-Artist International Music Festival in South Korea, performing with a festival orchestra. —ABC News, 16 Apr. 2026

Word History

Etymology

Latin, from Greek orchēstra, from orcheisthai to dance; perhaps akin to Sanskrit ṛghāyati he trembles, he rages

First Known Use

1606, in the meaning defined at sense 1a

Phrases Containing orchestra

• chamber orchestra
• symphony orchestra
• the orchestra

Kids Definition

orchestra

noun

or·​ches·​tra ˈȯr-kə-strə 

-ˌkes-trə

1

: the front part of the main floor of a theater

2

: a group of musicians who perform instrumental music using mostly stringed instruments

Etymology

from Latin orchestra "the place in front of the stage where prominent persons sit," from Greek orchēstra "a semicircular area in front of the stage of a theater where the chorus dances," from orcheisthai "to dance"

Word Origin

In front of the ancient Greek stage was a semicircular space where a chorus danced, sang, and commented on the action of the play. The Greek word orchēstra referred to this space. It came from the verb orcheisthai, meaning "to dance." The word was borrowed into Latin, but the Roman orchestra was reserved for the seats of prominent persons, such as senators, instead of for a chorus. When English borrowed the word, it indicated the space occupied by a group of musicians, usually right in front of the stage. It also was used to refer to the group of musicians itself. Later, orchestra came to mean the forward part or all of the main floor of a theater.