Breadcrumb Home > Dictionary > Index O Cite observational: Meaning and Definition of Find definitions for: ob•ser•va•tion•al Pronunciation: (ob"zr-v?'shu-nl), [key] ? adj. of, pertaining to, or founded on observation, esp. founded on observation rather than experiment. Random House Unabridged Dictionary, Copyright 1997, by Random House, Inc., on Infoplease. See also: observational (Thesaurus) observation observation car TrendingHere are the facts and trivia that people are buzzing about. February 2021 Current Events: US News The Berlin Conference and the Partition of Africa The Implied Powers of Congress The Women's March on Versailles Keeping Your Brain Active in a COVID-19 World The Manchu Related Content Daily Word Quiz: plebeian Analogy of the Day: Today?s Analogy Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language