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
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
Mothballs could slightly help combat spiders by killing their food source (moths). Kate Van Pelt, The Spruce, 29 Dec. 2025 Transfer these foods to storage containers with tightly-fitting lids to keep out pantry moths, roaches, ants, and other critters. Karen Brewer Grossman, Southern Living, 28 Dec. 2025 Until now, though, moths have not been known to drink the tears of North American moose. Madison Dapcevich, Outside, 25 Dec. 2025 Now, for the first time, researchers have documented moths drinking the tears of a moose—just the second time the behavior has been documented outside of the tropics. Gennaro Tomma, Scientific American, 12 Dec. 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 10 Jan. 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

More from Merriam-Webster on moth

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