/ Dictionary / Index O open-reel tape: Meaning and Definition of Find definitions for: o'pen-reel tape" Pronunciation: (ō'pun-rēl"), [key] audiotape, usually in. (64 mm) wide, wound on a single reel and requiring a separate take-up reel for playing or recording. Also called Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. open quote open registry Related Content Daily Word Quiz: morose Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language