/ Dictionary / Index M monomer: Meaning and Definition of Find definitions for: mon•o•mer Pronunciation: (mon'u-mur), [key] — n. Chem. a molecule of low molecular weight capable of reacting with identical or different molecules of low molecular weight to form a polymer. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: monomer (Thesaurus) monomania monomerous Related Content Daily Word Quiz: digression Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language