/ Dictionary / Index A à l'improviste*: Meaning and Definition of Find definitions for: à l'im•pro•viste Pronunciation: (a lan-prô-vēst'), [key] — French. French. all of a sudden; unexpectedly; suddenly. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. alimony Ali Muhammad of Shiraz Related Content Daily Word Quiz: careening Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language