/ Dictionary / Index V vacillant: Meaning and Definition of Find definitions for: vac•il•lant Pronunciation: (vas'u-lunt), [key] — adj. wavering; hesitant; indecisive; vacillating. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: vacillant (Thesaurus) Vachel vacillate Related Content Daily Word Quiz: lyceum Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language