a newt, esp. the smooth newt, Lissotriton vulgaris; (also) any newt in an aquatic stage of its life cycle.

An old book-name of the water-newt, or some allied animal; in later use applied to a genus of lizards (Cordylus).

(originally) any of various lizards or lizard-like animals living in or near water, esp. a newt (family Salamandridae) (now rare); (in later use)…

= newt, n.