/ Dictionary / Index I invasive: Meaning and Definition of Find definitions for: in•va•sive Pronunciation: (in-vā'siv), [key] — adj. characterized by or involving invasion; offensive: invasive war. invading, or tending to invade; intrusive. requiring the entry of a needle, catheter, or other instrument into a part of the body, esp. in a diagnostic procedure, as a biopsy. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: invasive (Thesaurus) invasion of privacy invected Related Content Daily Word Quiz: acquiesce Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language