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
Examples of flea in a Sentence
Recent Examples on the Web
The disease circulates naturally among rodents and can be passed to humans via fleas.
—
Sara Hashemi, Smithsonian Magazine, 14 July 2025
Use an insect repellent containing 20-30 percent DEET and tuck pant cuffs into your socks to help prevent flea bites.
—Stephanie Innes, AZCentral.com, 11 July 2025
The disease can be transmitted to humans from the bite of an infected flea or through contact with an infected animal.
—Sonam Sheth
gabe Whisnant, MSNBC Newsweek, 11 July 2025
The Cleveland Clinic advises people to minimize their risk of plague by avoiding flea bites and exercising caution around animals that could be infected with the bacteria.
—Chantelle Lee, Time, 11 July 2025
See All Example Sentences for flea
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Sara Hashemi, Smithsonian Magazine, 14 July 2025
Use an insect repellent containing 20-30 percent DEET and tuck pant cuffs into your socks to help prevent flea bites.
—Stephanie Innes, AZCentral.com, 11 July 2025
The disease can be transmitted to humans from the bite of an infected flea or through contact with an infected animal.
—Sonam Sheth
gabe Whisnant, MSNBC Newsweek, 11 July 2025
The Cleveland Clinic advises people to minimize their risk of plague by avoiding flea bites and exercising caution around animals that could be infected with the bacteria.
—Chantelle Lee, Time, 11 July 2025
See All Example Sentences for flea
Cite this Entry
“Flea.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/flea. Accessed 21 Jul. 2025.
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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