/ Dictionary / Index M meth: Meaning and Definition of Find definitions for: meth Pronunciation: (meth), [key] — n. Slang. methamphetamine; Methedrine. meth- Pronunciation: [key] a combining form representingin compound words: methenamine. Meth. Pronunciation: [key] Methodist. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: meth (Thesaurus) metestrus methacetin Related Content Daily Word Quiz: eureka Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language