any of several predatory dolphins, especially the black-and-white Orcinus orca, found in all seas.
Origin
1880-85
Examples from the web for killer whale
It's not as if you can figure out the intention of a killer whale while it's hunting for seals with younger whales.
Check out the killer whale skeleton and the dinosaur fossil collections.
The draft status report for the killer whale was reviewed by researchers and state, provincial, and federal agencies.
Observations on the birth and development of a captive-born killer whale.
British Dictionary definitions for killer whale
killer whale
noun
1.
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