any of several predatory dolphins, especially the black-and-white Orcinus orca, found in all seas.
Origin of killer whale
First recorded in 1880–85
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British Dictionary definitions for killer whale
a predatory black-and-white toothed whale, Orcinus orca, with a large erect dorsal fin, most common in cold seas: family DelphinidaeAlso called: killer, grampus, orc
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012