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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
Marineland has until December 2026 to rehome its two remaining killer whales, Keijo and Wikie.
—Alan Taylor, The Atlantic, 10 Jan. 2025
The tragic event highlighted the plight of the Southern Resident killer whales, whose population struggles under immense environmental pressures.
—Tom Howarth, Newsweek, 3 Jan. 2025
Southern Resident killer whales, one of several distinct orca communities that inhabit the Pacific Northwest, generally stay near British Columbia and Washington State, though some swim north to Alaska and south to California.
—Adeel Hassan, New York Times, 3 Jan. 2025
It’s estimated there are only 50,000 killer whales globally.
—Doha Madani, NBC News, 25 Dec. 2024
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Word History
First Known Use
1884, in the meaning defined above
Dictionary Entries Near killer whale
Cite this Entry
“Killer whale.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/killer%20whale. Accessed 14 Jan. 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
More from Merriam-Webster on killer whale
Britannica.com: Encyclopedia article about killer whale
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