- 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
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
- 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