Webster's Revised Unabridged Dictionary · 1913

Moth

Moth (moth) , noun

A mote. [Obsolete] — Shakespeare

Moth (mothz) , noun

[Old English mothe, Anglo-Saxon moeee; akin to Dutch mot, German motte, Icelandic motti, and prob. to English mad an earthworm. Compare Mad, n., Mawk.]

1.
(Zoology) Any nocturnal lepidopterous insect, or any not included among the butterflies; as, the luna moth; Io moth; hawk moth.
2.
(Zoology) Any lepidopterous insect that feeds upon garments, grain, etc.; as, the clothes moth; grain moth; bee moth. See these terms under Clothes, Grain, etc.
3.
(Zoology) Any one of various other insects that destroy woolen and fur goods, etc., esp. the larvae of several species of beetles of the genera Dermestes and Anthrenus. Carpet moths are often the larvae of Anthrenus. See Carpet beetle, under Carpet, Dermestes, Anthrenus.
4.
Anything which gradually and silently eats, consumes, or wastes any other thing.
Collocations (5)
Moth blight (Zoology) , any plant louse of the genus Aleurodes, and related genera. They are injurious to various plants.
Moth gnat (Zoology) , a dipterous insect of the genus Bychoda, having fringed wings.
Moth hunter (Zoology) , the goatsucker.
Moth miller (Zoology) , a clothes moth. See Miller, 3, (a).
Moth mullein (Botany) , a common herb of the genus Verbascum (Verbascum Blattaria), having large wheel-shaped yellow or whitish flowers.