Illustration of flea
: any of an order (Siphonaptera) of small wingless bloodsucking insects that have a hard laterally compressed body and legs adapted to leaping and that feed on warm-blooded animals
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Examples of flea in a Sentence
Recent Examples on the Web
The shelter takes in about 350 animals each year, providing each one with medical attention, including spaying/neutering, vaccines, a microchip, testing for common illnesses, dewormer and flea and heartworm prevention.
—
Amanda Rosa
april 9, Miami Herald, 9 Apr. 2026
People also can catch typhus by breathing in flea dirt or rubbing it into their eyes, the agency said.
—Don Sweeney
april 8, Sacbee.com, 8 Apr. 2026
As explained by the Centers for Disease Control and Prevention (CDC), plague, caused by the bacterium, Yersinia pestis, is an illness that affects all mammals, including humans, that is contracted through infected fleas.
—Moná Thomas, PEOPLE, 6 Apr. 2026
Residents can protect against the disease by using flea-control treatments on pets year-round, avoiding handling or feeding stray animals, and keeping wildlife away with security trash cans and blocking entry points and hiding places on residential properties.
—City News Service, Daily News, 3 Apr. 2026
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Amanda Rosa
april 9, Miami Herald, 9 Apr. 2026
People also can catch typhus by breathing in flea dirt or rubbing it into their eyes, the agency said.
—Don Sweeney
april 8, Sacbee.com, 8 Apr. 2026
As explained by the Centers for Disease Control and Prevention (CDC), plague, caused by the bacterium, Yersinia pestis, is an illness that affects all mammals, including humans, that is contracted through infected fleas.
—Moná Thomas, PEOPLE, 6 Apr. 2026
Residents can protect against the disease by using flea-control treatments on pets year-round, avoiding handling or feeding stray animals, and keeping wildlife away with security trash cans and blocking entry points and hiding places on residential properties.
—City News Service, Daily News, 3 Apr. 2026
See All Example Sentences for flea
Cite this Entry
“Flea.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/flea. Accessed 9 Apr. 2026.
Copy CitationKids Definition
flea
noun
: any of an order of small wingless bloodsucking insects with a hard body and legs used for leaping
Medical Definition
flea
noun
: any of the order Siphonaptera comprising wingless bloodsucking insects that have a hard laterally compressed body and legs adapted to leaping and that feed on warm-blooded animals see cat flea, chigoe sense 1, dog flea, rat flea, sand flea, sticktight flea
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