Destitute of the faculty of speech. deaf and dumb: see deaf, adj. 1e.

Unable to speak on account of illness, injury, or extreme exhaustion.

Applied to animals, as naturally lacking the power of speech. Cf. dumb, adj. 1b. Now rare except in mute swan, n.

Lacking knowledge of language or languages; lacking the ability to speak.

Having or keeping the mouth tightly closed or wide open; unable or unwilling to speak; (also) affected by lockjaw (lockjaw, n. 1) (rare). Also in…