Breadcrumb Home > Dictionary > Index O off-key: Meaning and Definition of Find definitions for: off-key Pronunciation: (ôf'kē', of'-), [key] — adj. deviating from the correct tone or pitch; out of tune. somewhat irregular, abnormal, or incongruous. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: off-key (Thesaurus) off-islander offlap TrendingHere are the facts and trivia that people are buzzing about. Animal Group Terminology Largest Countries in the World (by Area) Current Events This Week: January 2023 State Abbreviations Dinosaur Fossils (By U.S. State!) The Chinese Zodiac ✖ Related Content Daily Word Quiz: locution Analogy of the Day: Today’s Analogy Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language