Webster's Revised Unabridged Dictionary · 1913

Kitten

Kitten (kit"t'n) , noun

[Old English kiton, a dim. of cat; compare German kitze a young cat, also a female cat, and French chaton, dim. of chat cat, also English kitling. See Cat.]

A young cat.

Kitten , verb, transitive and intransitive

To bring forth young, as a cat; to bring forth, as kittens. — Shakespeare