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 …

A killer is someone or something that kills, such as a murderer or a serial killer. Killer may also refer to:

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.

Definition of killer noun from the Oxford Advanced Learner's Dictionary. a person, an animal or a thing that kills. Police are hunting his killer. Heart disease is the biggest killer in Scotland. The …

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.

May 15, 2024 · Serial killers and their gruesome crimes have sparked terror and intrigue for centuries. From Hungarian countess Elizabeth Báthory in the 1600s to more recent examples …

Oct 26, 2012 · What is a basic definition of killer? A killer is a person or thing that kills, meaning they end lives. Killer is also used in slang to mean something that is devastating or exhausting. …

Oct 22, 2025 · noun the causal agent resulting in death “heart disease is the biggest killer in the United States” synonyms: cause of death see more