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 dogs that were seized were all found to have fleas and skin irritation, according to the warrant affidavit.
—
Justin Muszynski, Hartford Courant, 19 Apr. 2025
It’s proven to kill fleas, flea eggs, larvae, lice and ticks.
—Christopher Murray, FOXNews.com, 12 Apr. 2025
Most insects also have wings, although a few, like fleas, don’t.
—Nicholas Green, The Conversation, 24 Mar. 2025
Around the same time, fleas began spreading plague — yes, plague — in the Great Plains.
—Benji Jones, Vox, 26 Feb. 2025
See All Example Sentences for flea
Examples are automatically compiled from online sources to
show current usage.
Read More
Opinions expressed in the examples do not represent those of Merriam-Webster or its editors.
Send us feedback.
Justin Muszynski, Hartford Courant, 19 Apr. 2025
It’s proven to kill fleas, flea eggs, larvae, lice and ticks.
—Christopher Murray, FOXNews.com, 12 Apr. 2025
Most insects also have wings, although a few, like fleas, don’t.
—Nicholas Green, The Conversation, 24 Mar. 2025
Around the same time, fleas began spreading plague — yes, plague — in the Great Plains.
—Benji Jones, Vox, 26 Feb. 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 29 Apr. 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
Love words? Need even more definitions?
Merriam-Webster unabridged
Share