Lewis Short
pervĭgĭlĭum (noun N) : id.
* A watching all night, a remaining awake or sitting up all night long.
* In gen., Plin. 11, 53, 118, § 283: pervigilio fatigati,Just. 13, 8, 6: inter cotidiana pervigilia fessus,Sen. Ira, 3, 29, 1.
* 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.
Charlton T. Lewis, Charles Short, A Latin Dictionary