/ Dictionary / Index S secretion: Meaning and Definition of Find definitions for: se•cre•tion Pronunciation: (si-krē'shun), [key] — n. (in a cell or gland) the act or process of separating, elaborating, and releasing a substance that fulfills some function within the organism or undergoes excretion. the product of this act or process. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: secretion (Thesaurus) secretin secretive Related Content Daily Word Quiz: endear Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language