What is "semimute"

Semimute \Sem`i*mute"\, a. Having the faculty of speech but imperfectly developed or partially lost.

Semimute \Sem"i*mute`\, n. A semimute person.

a. Having the faculty of speech either imperfectly developed or partially lost. n. One who has the faculty of speech either imperfectly developed or partially lost.