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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But those protections also extend to the wider ecosystem — such as the yucca moth. Lila Seidman, Los Angeles Times, 6 Feb. 2025 Cave moths clung to the walls, their tiny eyes glittering in my lamp’s beam. Gina Decaprio Vercesi, Travel + Leisure, 23 Jan. 2025 Ophiocordyceps sinensis fungus is a parasite that targets the caterpillar that is the larva of the ghost moth. Daile Zhang, The Conversation, 14 Jan. 2025 The mite Tetranychus urticae mates an average of 13 times a day, and the moth Ephestia kuehniella mates five times in its lifetime. Tommy Tuberville, Newsweek, 9 Jan. 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

Dictionary Entries Near moth

Cite this Entry

“Moth.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/moth. Accessed 10 Feb. 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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