Source : Webster's Revised Unabridged Dictionary (1913)

Choral \Cho"ral\, a. [LL. choralis, fr. L. chorus. See
   {Chorus}.]
   Of or pertaining to a choir or chorus; singing, sung, or
   adapted to be sung, in chorus or harmony.

   {Choral service}, a service of song.

Choral \Cho"ral\, n. (Mus.)
   A hymn tune; a simple sacred tune, sung in unison by the
   congregation; as, the Lutheran chorals. [Sometimes written
   {chorale}.]

Source : WordNet®

choral
     adj : related to or written for or performed by a chorus or choir;
           "choral composition"; "choral ensemble"

choral
     n : a stately Protestant (especially Lutheran) hymn tune [syn: {chorale}]