(dated) Unable to speak; lacking power of speech (kept in "deaf, dumb, and blind"). / (dated) Silent; unaccompanied by words. / (informal, derogatory, especially of a person) Extremely stupid.

(dated) To silence. / (transitive) To make stupid. / (transitive) To represent as stupid. / (transitive) To reduce the intellectual demands of.

simple past tense and past participle of dumb

(dated) The state of being mute: that is, of not communicating vocally, whether from selective mutism (refusal to speak) or from an inability to speak.

present participle of dumb

Third-person singular simple present indicative form of dumb

plural of dumbness

(idiomatic, transitive) To convey some subject matter in simple terms, avoiding technical or academic language, especially in a way that is considered condescending.

(rare, slang, derogatory) Extremely stupid.

(nautical) The hull of a barge, in tow of a tug, used for the carriage of cargo