/ Dictionary / Index B Benelux: Meaning and Definition of Find definitions for: Ben•e•lux Pronunciation: (ben'l-uks"), [key] — n. a customs union comprising Belgium, the Netherlands, and Luxembourg, begun January 1, 1948. Belgium, the Netherlands, and Luxembourg considered together. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: benelux (Thesaurus) benefit society Benemid Related Content Daily Word Quiz: neologism Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language