/ Dictionary / Index P propagation: Meaning and Definition of Find definitions for: prop•a•ga•tion Pronunciation: (prop"u-gā'shun), [key] — n. the act of propagating. the fact of being propagated. multiplication by natural reproduction. transmission or dissemination. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: propagation (Thesaurus) propagate propagule Related Content Daily Word Quiz: fidelity Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language