/ Dictionary / Index A actuary: Meaning and Definition of Find definitions for: ac•tu•ary Pronunciation: (ak'ch-er"ē), [key] — pl. -ar•ies. a person who computes premium rates, dividends, risks, etc., according to probabilities based on statistical records. (formerly) a registrar or clerk. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: actuary (Thesaurus) actual sin actuate Related Content Daily Word Quiz: soporific Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language