: any of an order or suborder (Blattodea synonym Blattaria) of chiefly nocturnal insects including some that are domestic pests compare german cockroach

Examples of cockroach in a Sentence

Recent Examples on the Web
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But she, and New York Times journalists observing the raid, were soon distracted by a group of cockroaches scurrying past an oil canister. — Zishaan A Latif, New York Times, 3 Oct. 2026 Sacramento County Health Inspectors gave a red placard to a local grocery store after finding a cockroach egg sac stuck on a glue trap. — Veronica Fernandez-Alvarado, Sacbee.com, 2 Oct. 2026 Students came together as a community to ask Cook County School District 130 Superintendent and the board of education to take immediate action to eradicate cockroaches, mold, mice and maggots from their schools. — Olivia Stevens, Chicago Tribune, 1 Oct. 2026 In the Southeast, warm, wet conditions may extend mosquito and cockroach activity. — Michele Laufik, Martha Stewart, 25 Sep. 2026 See All Example Sentences for cockroach

Word History

Etymology

by folk etymology from Spanish cucaracha cockroach

First Known Use

1616, in the meaning defined above

Time Traveler
The first known use of cockroach was in 1616

Cite this Entry

“Cockroach.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/cockroach. Accessed 9 Oct. 2026.

Kids Definition

cockroach

noun
: any of an order of quick-moving insects that have long antennae and leathery forewings, are mainly nocturnal, and include pests of human dwellings

Medical Definition

: any of an order or suborder (Blattodea synonym Blattaria) of chiefly nocturnal insects including some that are domestic pests see blatta, blattella, periplaneta

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