\Re*veil"le\, n. [F. r['e]veil, fr. r['e]veiller to
awake; pref. re- re- + pref. es- (L. ex) + veiller to awake,
watch, L. vigilare to watch. The English form was prob. taken
by mistake from the French imper. r['e]veillez,2d pers. pl.
See {Vigil}.] (Mil.)
The beat of drum, or bugle blast, about break of day, to give
notice that it is time for the soldiers to rise, and for the
sentinels to forbear challenging. ``Sound a reveille.''
--Dryden.
      For at dawning to assail ye Here no bugles sound
      reveille.                                --Sir W.
                                               Scott.