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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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To protect against humidity, add a sachet of rice and store velvet ornaments with cedar blocks to ward off moths. Gabi De La Rosa, Southern Living, 29 Nov. 2025 Generally, moth orchids need water once a week. Leanne Potts, Better Homes & Gardens, 29 Nov. 2025 Both brooches have been part of Queen Camilla’s personal jewelry collection for several years, with the queen consort wearing the moth brooch in particular on other official royal occasions. Julia Teti, Footwear News, 21 Nov. 2025 Noah’s New York Bagels had dead moths, ants Noah’s New York Bagels, 7423 Fair Oaks Blvd. Veronica Fernandez-Alvarado, Sacbee.com, 21 Nov. 2025 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 5 Dec. 2025.

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

More from Merriam-Webster on moth

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