/ Dictionary / Index V vail: Meaning and Definition of Find definitions for: vail Pronunciation: (vāl), [key] — v.t. to let sink; lower. to take off or doff (one's hat), as in respect or submission. vail Pronunciation: (vāl), [key] — Archaic. Archaic. —v.i., v.t. to be of use or profit; avail. —n. a tip; gratuity. vail Pronunciation: (vāl), [key] — Obs. Obs. —n. a veil. —v.t. to veil. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. vagus nerve vain Related Content Daily Word Quiz: respite Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language