/ Dictionary / Index I iris shutter: Meaning and Definition of Find definitions for: i'ris shut"ter Pronunciation: [key] a camera shutter having a group of overlapping blades that open and close at the center when exposing film. Also called Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. iris-out iritis 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