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
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.
Bigg’s killer whales live in the North Pacific Ocean. Sarah Kuta, Smithsonian Magazine, 3 Apr. 2025 For the first time, a group of killer whales has been documented preying upon a prickly shark, a rare deep-sea dweller, according to a study published on March 20 in the journal Frontiers in Fish Science. Brendan Rascius, Miami Herald, 25 Mar. 2025 The family is part of a group of orcas called Biggs killer whales or transient killer whales. Laura Baisas, Popular Science, 20 Mar. 2025 According to the National Oceanic and Atmospheric Administration, false killer whales bear a similar appearance to orcas — often called killer whales — but are actually part of the dolphin family. Rachel Raposas, People.com, 19 Feb. 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 14 Apr. 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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