/ Dictionary / Index M Mann Act: Meaning and Definition of Find definitions for: Mann' Act" Pronunciation: (man), [key] an act of the U.S. Congress (1910) making it a federal offense to aid or participate in the interstate transportation of a woman for immoral purposes. Also called Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. manna Mannaean Related Content Daily Word Quiz: feline Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language