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