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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If the sky projection rotated, the moths shifted their trajectory to match. Lauren Leffer, Popular Science, 18 June 2025 The researchers also attached electronic sensors to the moths to measure their brain activity. Kenna Hughes-Castleberry, Space.com, 18 June 2025 Researchers have shown that the Earth's magnetic field helps the moths orient, but that alone wasn't sufficient. Ari Daniel, NPR, 18 June 2025 The flowers are pollinated by bats and moths and produce purplish-red fruits. Mary Marlowe Leverette, Southern Living, 15 June 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

Browse Nearby Words

Cite this Entry

“Moth.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/moth. Accessed 30 Jun. 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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