/ Dictionary / Index O OCD: Meaning and Definition of Find definitions for: OCD Pronunciation: [key] Office of Civil Defense. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. occurrence OCDM Related Content Daily Word Quiz: panacea Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language