/ Dictionary / Index U under-the-counter: Meaning and Definition of Find definitions for: un•der-the-count•er Pronunciation: (un'dur-u-koun'tur), [key] — adj. (of merchandise) sold clandestinely. illegal; unauthorized: under-the-counter payments. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: under-the-counter (Thesaurus) undertenant under-the-table Related Content Daily Word Quiz: spectral Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language