/ Dictionary / Index O optionee: Meaning and Definition of Find definitions for: op•tion•ee Pronunciation: (op"shu-nē'), [key] — n. a person who acquires or holds a legal option. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. optional opto- Related Content Daily Word Quiz: belligerent Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language