pervĭgĭlĭum, ii, n. [pervigil], a watching all night, a remaining awake or sitting up all night long.
I In gen., Plin. 11, 53, 118, § 283: pervigilio fatigati, Just. 13, 8, 6: inter cotidiana pervigilia fessus, Sen. Ira, 3, 29, 1.—
II In partic., a devotional watching , a vigil : castra pervigilio neglecta, Liv. 23, 35: celebrare, Tac. A. 15, 44: indicere, Suet. Calig. 54: pervigilio anniversario colere, id. Galb. 4: agere, id. Vit. 10; Plin. 18, 12, 32, § 124: Pervigilium Veneris, the name of a little Latin poem by an unknown author , of perhaps the second century A. D.