/ Dictionary / Index M molder: Meaning and Definition of Find definitions for: mold•er Pronunciation: (mōl'dur), [key] — v.i. to turn to dust by natural decay; crumble; disintegrate; waste away: a house that had been left to molder. —v.t. to cause to molder. mold•er Pronunciation: (mōl'dur), [key] — n. a person or thing that molds. a person who makes molds. one of a set of electrotyped plates used only for making duplicate electrotypes. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: molder (Thesaurus) molded depth molding Related Content Daily Word Quiz: arid Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language