KILLER definition: 1. someone who kills another person: 2. something that kills people, especially a disease or other…. Learn more.

The meaning of KILLER is one that kills. How to use killer in a sentence.

Sep 5, 2025 · The killer appeared in London’s Whitechapel district in 1888 and murdered five women—all sex workers—and mutilated their corpses. Police surmised the killer was a surgeon, …

A killer is a person who has killed someone, or who intends to kill someone. The police are searching for his killers. He's a psychopath, a killer.

1. One that kills: a disease that was a killer of thousands; a killer of new ideas. 2. Slang Something that is extremely difficult to deal with or withstand: an exam that was a real killer.

Definition of killer noun in Oxford Advanced Learner's Dictionary. Meaning, pronunciation, picture, example sentences, grammar, usage notes, synonyms and more.

Although a serial killer is a distinct classification that differs from that of a mass murderer, spree killer, or contract killer, there are overlaps between them.