1
2
: any of various usually nocturnal lepidopteran insects with antennae that are often feathery, with a stouter body, duller coloring, and proportionately smaller wings than the butterflies, and with larvae that are plant-eating caterpillars
-er/-est
: full of moths

Examples of moth in a Sentence

Recent Examples on the Web
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Noun
Twenty years after Darwin died such a moth was indeed found in Madagascar, and given the species name praedicta to honor the insight. Literary Hub, 20 Aug. 2026 The nectar might contain some toxins, but the hummers and moths don’t drink enough to be harmed. Joan Morris, Mercury News, 17 Aug. 2026 Every camper has had their site taken over by moths at night. Olivia Young, Travel + Leisure, 13 Aug. 2026 The erratic thumping of moths doomed by the siren-pull of the kitchen light. ABC News, 12 Aug. 2026 See All Example Sentences for moth

Word History

Etymology

Noun

Middle English mothe, from Old English moththe; akin to Middle High German motte moth

First Known Use

Noun

before the 12th century, in the meaning defined at sense 1

Time Traveler
The first known use of moth was before the 12th century

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Cite this Entry

“Moth.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/moth. Accessed 26 Aug. 2026.

Kids Definition

: any of a group of night-flying insects that are lepidopterans often with duller coloring, stouter bodies, and smaller wings than the related butterflies and with antennae which are often feathery

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