/ Dictionary / Index I instillation: Meaning and Definition of Find definitions for: in•stil•la•tion Pronunciation: (in"stu-lā'shun), [key] — n. the act of instilling. something instilled. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: instillation (Thesaurus) instill instillator 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