/ Dictionary / Index M milt: Meaning and Definition of Find definitions for: milt Pronunciation: (milt), [key] — n. the sperm-containing secretion of the testes of fishes. the testes and sperm ducts when filled with this secretion. melt. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: milt (Thesaurus) milreis milter Related Content Daily Word Quiz: morose Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language