Pronunciation: (ves'pur-tin, -tīn"), [key]
1. of, pertaining to, or occurring in the evening: vespertine stillness.
2. Bot.opening or expanding in the evening, as certain flowers.
3. Zool.appearing or flying in the early evening; crepuscular. Also,ves•per•ti•nalPronunciation: (ves"pur-tīn'l). [key]
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.