choral

from The American Heritage® Dictionary of the English Language, 5th Edition.

• adjective Of or relating to a chorus or choir.
• adjective Performed or written for performance by a chorus.

from The Century Dictionary.

• Pertaining to or characteristic of a chorus or a choir; performed in rhythmic concert, as music or dancing.
• In music, specifically, pertaining to or designed for concerted vocal, as distinguished from instrumental, performance: as, Mendelssohn's choral works.
• noun A simple musical composition in harmony, suited for performance by a chorus. Often written chorale.—
• noun A tune written or arranged for a sacred hymn or psalm; specifically, such a tune written in the style of the hymn-tunes of the early Protestant churches, both Lutheran and Reformed, having a plain melody, a strong harmony, and a stately rhythm.
• noun In the Roman Catholic Church, any part of the service which is sung by the whole choir (cantus choralis), generally consisting of a part of the ancient church music (cantus firmus), sung in unison, or more frequently sung by the tenor, while a greater freedom is allowed in the parts.

from the GNU version of the Collaborative International Dictionary of English.

• adjective Of or pertaining to a choir or chorus; singing, sung, or adapted to be sung, in chorus or harmony.
• adjective a service of song.
• noun (Mus.) A stately hymn tune; a simple sacred tune, sung in unison by the congregation, used mostly in Protestant (especially Lutheran) churches.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• adjective of, relating to, written for, or performed by a choir or a chorus
• noun variant spelling of chorale

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• noun a stately Protestant (especially Lutheran) hymn tune
• adjective related to or written for or performed by a chorus or choir