killer whale

noun

: a relatively small toothed whale (Orcinus orca of the family Delphinidae) that is black above with white underparts and white oval-shaped patches behind the eyes, attains a length of 20 to 30 feet (6 to 9 meters), typically hunts in groups, and preys chiefly on sea mammals (such as seals, sea lions, and other whales), large fish, and squid

called also orca

Examples of killer whale in a Sentence

Recent Examples on the Web
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In short, the killer whales may just be charitable or curious. Brendan Rascius july 2, Miami Herald, 2 July 2025 Kelp forests are also critical nursery habitat for juvenile chinook salmon — a key part of killer whales’ diet, Giles said. Marlowe Starling, CNN Money, 23 June 2025 Other highlights from the Shark Week 2025 slate include Great White Assassins, a look into how some killer whales easily hunt and kill great white sharks, and In the Eye of the Storm: Shark Storm, an exploration of shark attacks along the Gulf Coast in 2024. Kelli Bender, People.com, 23 June 2025 The scientists saw first-hand how resident orcas off the west coast of North America were sourcing kelp and breaking pieces off the plants, then pressing it against another killer whale's body. New Atlas, 23 June 2025 See All Example Sentences for killer whale

Word History

First Known Use

1884, in the meaning defined above

Time Traveler
The first known use of killer whale was in 1884

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Cite this Entry

“Killer whale.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/killer%20whale. Accessed 16 Jul. 2025.

Kids Definition

killer whale

noun
kill·​er whale
ˈkil-ər-
: a flesh-eating mostly black toothed whale 20 to 30 feet (about 6 to 9 meters) long that travels in groups

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