/ Dictionary / Index R reasoning: Meaning and Definition of Find definitions for: rea•son•ing Pronunciation: (rē'zu-ning, rēz'ning), [key] — n. the act or process of a person who reasons. the process of forming conclusions, judgments, or inferences from facts or premises. the reasons, arguments, proofs, etc., resulting from this process. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: reasoning (Thesaurus) reasoned reasonless Related Content Daily Word Quiz: cautious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language