/ Dictionary / Index A act of faith: Meaning and Definition of Find definitions for: act' of faith' Pronunciation: [key] an act that demonstrates or tests the strength of a person's convictions, as an important personal sacrifice. Cf. auto-da-fé. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. acto act of God Related Content Daily Word Quiz: labyrinth Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language