/ Dictionary / Index I instal: Meaning and Definition of Find definitions for: in•stal Pronunciation: (in-stôl'), [key] — -stalled, -stal•ling. install. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: instal (Thesaurus) instable install Related Content Daily Word Quiz: penury Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language