/ Dictionary / Index A actual sin: Meaning and Definition of Find definitions for: ac'tual sin' Pronunciation: [key] — Theol. Theol. any sin committed by an individual of his or her free will, as contrasted with original sin. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. actually actuary Related Content Daily Word Quiz: arid Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language