/ Dictionary / Index L Las Vegas night: Meaning and Definition of Find definitions for: Las Ve'gas night" Pronunciation: [key] an evening of casino-style gambling, usually sponsored by a charitable, religious, or other fund-raising organization. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Las Vegas lat 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