moth definition by Webster's New World
- any of various families of chiefly night-flying lepidopteran insects, similar to the butterflies but generally smaller, less brightly colored, and not having the antennae knobbed
- clothes moth
Origin: Middle English motthe ; from Old English moththe, akin to German motte ; from Indo-European base an unverified form math-, gnawing vermin
moth definition by American Heritage Dictionary
noun pl. moths moths
- Any of numerous insects of the order Lepidoptera, generally distinguished from butterflies by their nocturnal activity, hairlike or feathery antennae, stout bodies, and the frenulum that holds the front and back wings together.
- A clothes moth.
Origin: Middle English motthe, from Old English moththe.