bullfrog
noun
bull·frog
ˈbu̇l-ˌfrȯg 
also ˈbəl-,
-ˌfräg
plural bullfrogs
: a heavy-bodied deep-voiced frog (Lithobates catesbeianus synonym Rana catesbeiana) of the eastern U.S. and southern Canada that has been introduced elsewhere
Examples of bullfrog in a Sentence
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It was first successfully employed in an aquatic environment in 2008 to detect the presence of an invasive species — the American bullfrog — in France, after more traditional methods of DNA detection, such as audio or visual surveys, had been unsuccessful.
—
Katie Hunt, CNN Money, 7 Nov. 2025
Plumier told IndyStar that bullfrogs and green frogs are so plentiful and quick to breed that frog hunting hasn’t proven harmful to their populations in Indiana.
—Sophie Hartley, IndyStar, 9 Sep. 2025
Streams were dammed, diseases struck and the American bullfrog, a fearsome predator and the largest native frog east of the Rocky Mountains, was introduced.
—Nathan Rott, NPR, 19 July 2025
State Frog: The American bullfrog, adopted in 2010.
—Hailey Roden, The Enquirer, 2 July 2025
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Katie Hunt, CNN Money, 7 Nov. 2025
Plumier told IndyStar that bullfrogs and green frogs are so plentiful and quick to breed that frog hunting hasn’t proven harmful to their populations in Indiana.
—Sophie Hartley, IndyStar, 9 Sep. 2025
Streams were dammed, diseases struck and the American bullfrog, a fearsome predator and the largest native frog east of the Rocky Mountains, was introduced.
—Nathan Rott, NPR, 19 July 2025
State Frog: The American bullfrog, adopted in 2010.
—Hailey Roden, The Enquirer, 2 July 2025
See All Example Sentences for bullfrog
Cite this Entry
“Bullfrog.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/bullfrog. Accessed 17 Nov. 2025.
Copy CitationKids Definition
bullfrog
noun
bull·frog
-ˌfrȯg
-ˌfräg
: a large heavy frog that makes a booming or bellowing sound
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