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Synonyms

bullfrog

American  
[bool-frog, -frawg] / ˈbʊlˌfrɒg, -ˌfrɔg /

noun

  1. a large frog, especially the North American Rana catesbeiana, having a deep voice.

bullfrog British  
/ ˈbʊlˌfrɒɡ /

noun

  1. any of various large frogs, such as Rana catesbeiana ( American bullfrog ), having a loud deep croak

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Etymology

Origin of bullfrog

1690–1700, bull 1 + frog 1; so called from its size and voice

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

To further test the theory that Bd-Brazil spread internationally through bullfrog exports, researchers analyzed historical trade records, fungal genetics from Brazilian frog farms, and genetic data from bullfrogs sold in foreign markets.

From Science Daily • Jan. 19, 2026

"I sing like a bullfrog," he once told record producer Fred Foster.

From BBC • Sep. 30, 2024

The pangram from yesterday’s Spelling Bee was bullfrog.

From New York Times • Mar. 20, 2023

A bullfrog and a corgi puppy in a field of daffodils look toward the painted boy acrobat who hangs upside down from his rings, surrounded by butterflies and bumblebees.

From Los Angeles Times • Nov. 14, 2022

A bullfrog moved; she thrust out a foot and snagged it.

From "Frightful's Mountain" by Jean Craighead George

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.