/ Dictionary / Index O open-and-shut: Meaning and Definition of Find definitions for: o•pen-and-shut Pronunciation: (ō'pun-un-shut'), [key] — adj. immediately obvious upon consideration; easily decided: an open-and-shut case of murder. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: open-and-shut (Thesaurus) open air open-angle glaucoma Related Content Daily Word Quiz: clairvoyant Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language