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Definition of blue whale

blue whale

Plural:blue whales
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• noun

1

A massive marine mammal of the baleen whale suborder, native to oceans worldwide, characterized by its mottled bluish-gray color and recognized as the largest animal known to have ever lived on Earth.

Example

"During the pelagic expedition off the coast of California, the researchers were fortunate enough to observe a blue whale surfacing to breathe."

Synonyms
View all synonyms for blue whale

• Nearby Words

blue shark
blue tang
blue tongue
blue whale
blue wildebeest
blue-eyed grass
blue-tongued skink

Usage Trend

Historical frequency of usage in published text.

180019102020
Data source: Google Books Ngram Viewer

Cite this Entry

Wordmom. (2026). Definition of Blue whale. In Wordmom Dictionary. Retrieved Oct 18, 2026, from https://wordmom.com/dictionary/blue%20whale
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