kitten /ˈkɪtən̩/noun 5verb 1forms 3 noun5 •A young cat, especially before sexual maturity (reached at about seven months). •A young rabbit, rat, hedgehog, squirrel, fox, beaver, badger, etc.Rabbit babies are called kittens or kits. The mother prepares a cosy nest for her kittens. — 2009 •(informal) A term of endearment, especially for a woman.Speak only when spoken to, kitten. — 1995 •(informal) A girlfriend. •A moth of the genus Furcula. verb1 •To give birth to kittens.A cat about to kitten, must not be spoken of by its name, but called a witch. (Madagascar.) — 2003 formskittened · kittening · kittens