blue whale

noun

: a very large baleen whale (Balaenoptera musculus synonym Sibbaldus musculus) that may reach a weight of 150 tons (136 metric tons) and a length of 100 feet (30 meters) and is generally considered the largest living animal

Illustration of blue whale

Illustration of blue whale

Examples of blue whale in a Sentence

Recent Examples on the Web
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.
It's become the boy who cried wolf, bear, moose, badger, wombat, elephant, natterjack toad, mandrel, meerkat, blue whale, lesser skink, prairie dog, ferret, wildebeest, dingo, tree kangaroo, sloth, anteater, blue-footed booby, Norwegian Blue, and half the catalog in the Museum of Natural History. New Atlas, 24 Jan. 2026 Most of the roughly 1,300 species of ribbon worms are just a few millimeters wide and can be quite long—one species, Lineus longissimus, can measure up to 55 meters, or twice the average length of a blue whale. Marina Wang, Scientific American, 19 Jan. 2026 May to October is the prime time to witness humpbacks, blue whales, and minke whales. Chantelle Kincy, Travel + Leisure, 10 Jan. 2026 Tulkuns are, per James Cameron’s Avatar Wiki, the largest creatures on Pandora and three times the size of even the biggest blue whales. Fran Hoepfner, Vulture, 19 Dec. 2025 See All Example Sentences for blue whale

Word History

First Known Use

1851, in the meaning defined above

Time Traveler
The first known use of blue whale was in 1851

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Cite this Entry

“Blue whale.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/blue%20whale. Accessed 1 Feb. 2026.

Kids Definition

blue whale

noun
: a whale that may reach a weight of 150 tons (135 metric tons) and a length of 100 feet (30 meters) and is generally considered the largest living animal

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