/ Dictionary / Index I Instamatic: Meaning and Definition of Find definitions for: In•sta•mat•ic Pronunciation: (in"stu-mat'ik), [key] — Trademark. Trademark. a brand name for a pocket-size, fixed-focus, snapshot camera. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. installment plan instance Related Content Daily Word Quiz: sequester Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language