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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
These are the immature stages of small brown moths. Tom MacCubbin, The Orlando Sentinel, 27 June 2026 The savory along the river is teeming with bees, and small white moths light among the ghosts of withered bergamot. Meghan O’Gieblyn, Harpers Magazine, 30 June 2026 At night, moths will visit your linden tree to continue pollinating your garden. Sophia Beams, Better Homes & Gardens, 1 July 2026 Lavender The essential oil that gives lavender flowers and foliage their pleasant, calming scent has been shown to repel mosquitoes as well as other pesky insects like fleas, flies, and moths. Alexandra Jones, The Spruce, 5 July 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 7 Jul. 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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