Breadcrumb Home > Dictionary > Index O optimal: Meaning and Definition of Find definitions for: op•ti•mal Pronunciation: (op'tu-mul), [key] — adj. optimum (def. 3). Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: optimal (Thesaurus) optics optime TrendingHere are the facts and trivia that people are buzzing about. Ramadan and Eid al-Fitr 42 Best War Movie Quotes Current Events This Week: March 2023 Recycling Facts William Shakespeare Worst U.S. Forest Fires ✖ Related Content Daily Word Quiz: panacea Analogy of the Day: Today’s Analogy Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language