The eve of a religious festival observed by staying awake as a devotional exercise.
Ritual devotions observed on the eve of a holy day. Often used in the plural.
[Middle English vigile, a devotional watching, from Old French, from Latin vigilia, wakefulness, watch, from vigil, awake; see weg- in Indo-European roots.]
c.1225, "eve of a religious festival" (an occasion for devotional watching or observance), from Anglo-Fr. and O.Fr. vigile, from L. vigilia "watch, watchfulness," from vigil "watchful, awake," from PIE *wog-/*weg- "be lively or active, be strong" (cf. L. vigere "be lively, thrive," velox "fast, lively," vegere "to enliven;" Skt. vaja- "strength, speed;" O.E. wacan "to wake up, arise," wacian "to be awake;" O.H.G. wahta "watch, vigil"). Meaning "watch kept on a festival eve" is from c.1395; that of "occasion of keeping awake for some purpose" is recorded from 1711.
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.