/ Dictionary / Index A antisense: Meaning and Definition of Find definitions for: an•ti•sense Pronunciation: (an"tē-sens', an"tī-), [key] of or pertaining to a gene that is derived from RNA or complementary DNA, is inserted in reverse orientation into a strand of DNA, and is used in genetic engineering to regulate genetic expression of a trait. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. anti-Semitism antisepsis Related Content Daily Word Quiz: acerbity Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language