/ Dictionary / Index J Jensenism: Meaning and Definition of Find definitions for: Jen•sen•ism Pronunciation: ( jen'su-niz"um), [key] — n. the theory that an individual's IQ is largely due to heredity, including racial heritage. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Jensen jeon Related Content Daily Word Quiz: philtrum Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language