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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Having moths dancing unfolds like a shadow breaking the sun. Hazlitt, 17 Feb. 2026 With rosemary's repellent abilities, cabbage moths and worms stay clear of your garden so your veggies can grow healthy and strong. Ashlyn Needham, The Spruce, 16 Feb. 2026 After the blooms on your moth orchid (Phalaenopsis) have shriveled and fallen off the plant, you're left with a long, bare green stem (technically called a spike). Leanne Potts, Better Homes & Gardens, 15 Feb. 2026 Inspectors on average find about 40-50 plant pests a day, the most common being moths. CBS News, 6 Feb. 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

Browse Nearby Words

Cite this Entry

“Moth.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/moth. Accessed 25 Feb. 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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