plural moths ˈmȯt͟hz How to pronounce moth (audio) ˈmȯths How to pronounce moth (audio)
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: 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
mothlike adjective
mothy adjective

Examples of moth in a Sentence

Recent Examples on the Web
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That means spiders and insects, including grasshoppers, caterpillars, beetles, and moths. Sheryl De Vore, Chicago Tribune, 11 May 2026 The volatile oils that give bay leaves their distinct odor and flavors repel flies, moths, cockroaches, and even mice. Mary Marlowe Leverette, Southern Living, 10 May 2026 Not the suicidal wings of a moth against flame. Ellen Bass, New Yorker, 4 May 2026 Garlic and Shallots Garlic and shallots also emit strong, sulfurous odors effective against a wider range of insect pests including aphids, mites, caterpillars, armyworms, moths, beetles, and whiteflies. Barbara Gillette, The Spruce, 3 May 2026 See All Example Sentences for moth

Word History

Etymology

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

First Known Use

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 12 May. 2026.

Kids Definition

moth

noun
plural moths ˈmȯt͟hz How to pronounce moth (audio) ˈmȯths How to pronounce moth (audio)
: 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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