Mute; silent; refraining from speech.Destitute of the power of speech; unable to utter articulate sounds: as, a deaf and dumb person; the dumb brutes.Mute; not accompanied with or emitting speech or sound: as, a dumb show; dumb signs.Hence Lacking some usual power, manifestation, characteristic, or accompaniment; destitute of reality in some respect; irregular; simulative: as, dumb ague; dumb craft. See phrases below.Dull; stupid; doltish.Deficient in clearness or brightness, as a color.Synonyms and Mute, etc. See silent.To become dumb; be silent.To make dumb; silence; overpower the sound of.