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
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Consider using flea and tick preventatives and examine your dog after your hike.
—
Liz O'Connell, MSNBC Newsweek, 14 Oct. 2025
In his letter to the district, Lindstrom said that despite multiple requests to have the carpet removed, the flea infestation became so severe that parents were afraid to send their children to school, and those that did suffered from flea bites.
—Jennah Pendleton, Sacbee.com, 10 Oct. 2025
Toby, a towering tan tapeworm sculpture, greets employees at the front door to promote Elanco's Credelio Quattro medicine, which protects dogs against fleas, ticks and tapeworms.
—Alysa Guffey, IndyStar, 2 Oct. 2025
The incident involving Rupert, 48, and Phoebe Hearst Elementary occurred toward the end of last school year, when the school experienced a flea infestation, NBC affiliate KCRA and ABC affiliate KXTV reported.
—David Chiu, PEOPLE, 1 Oct. 2025
See All Example Sentences for flea
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Liz O'Connell, MSNBC Newsweek, 14 Oct. 2025
In his letter to the district, Lindstrom said that despite multiple requests to have the carpet removed, the flea infestation became so severe that parents were afraid to send their children to school, and those that did suffered from flea bites.
—Jennah Pendleton, Sacbee.com, 10 Oct. 2025
Toby, a towering tan tapeworm sculpture, greets employees at the front door to promote Elanco's Credelio Quattro medicine, which protects dogs against fleas, ticks and tapeworms.
—Alysa Guffey, IndyStar, 2 Oct. 2025
The incident involving Rupert, 48, and Phoebe Hearst Elementary occurred toward the end of last school year, when the school experienced a flea infestation, NBC affiliate KCRA and ABC affiliate KXTV reported.
—David Chiu, PEOPLE, 1 Oct. 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 18 Oct. 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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