/ Dictionary / Index A acumen: Meaning and Definition of Find definitions for: a•cu•men Pronunciation: (u-ky'mun, ak'yu-), [key] — n. keen insight; shrewdness: remarkable acumen in business matters. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: acumen (Thesaurus) aculeus acuminate Related Content Daily Word Quiz: perspicacious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language