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

Examples of moth in a Sentence

Recent Examples on the Web
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Meanwhile, 13 eateries received citations for health code violations including blackish mold-like growth in the facility, raw ducks improperly thawed and having a moth inside a container of rice. Veronica Fernandez-Alvarado april 24, Sacbee.com, 24 Apr. 2026 This paved the way for a fellowship and a PhD at UCLA (with a thesis on the tomato hornworm moth) that was also awarded the same accolade, but this one had followed a full year of total failure on a project that had not been based on observations from the wild. Literary Hub, 23 Apr. 2026 Even familiar seasonal visitors like miller moths could behave differently this year, potentially lingering longer in urban areas if food sources remain limited along their migration routes. Callie Zanandrie, CBS News, 23 Apr. 2026 The arching stems and sprays of golden flowers provide food, nesting, and winter shelter for bumblebees, long-and short-tongued bees, wasps, flies, butterflies, moths, beetles, spiders, and more. Teresa Woodard, Midwest Living, 21 Apr. 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 28 Apr. 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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