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Definition of Killer
1. Noun. Someone who causes the death of a person or animal.
Generic synonyms: Individual, Mortal, Person, Somebody, Someone, Soul
Specialized synonyms: Executioner, Public Executioner, Eradicator, Exterminator, Terminator, Choker, Garroter, Garrotter, Strangler, Throttler, Liquidator, Manslayer, Murderer, Poisoner, Regicide, Felo-de-se, Suicide
Derivative terms: Kill, Slay
2. Noun. The causal agent resulting in death. "Heart disease is the biggest killer in the United States"
Generic synonyms: Causal Agency, Causal Agent, Cause
Derivative terms: Kill, Kill
3. Noun. A difficulty that is hard to deal with. "That exam was a real killer"
4. Noun. Predatory black-and-white toothed whale with large dorsal fin; common in cold seas.
Generic synonyms: Dolphin
Group relationships: Genus Orcinus, Orcinus
Definition of Killer
1. n. One who deprives of life; one who, or that which, kills.
Definition of Killer
1. Noun. That which kills. ¹
2. Noun. (figuratively) That which causes stress or is extremely difficult, especially that which may cause failure at a task. ¹
3. Noun. (figuratively) Something that is so far ahead of its competition that it effectively kills off that competition. ¹
4. Noun. (sports) A knockout form of darts involving several players ¹
5. Noun. A diacritic mark used in Indic scripts to suppress an inherent vowel (e.g., the Hindi viram, the Bengali or Oriya hasanta) or render the entire syllable silent (e.g., the Burmese virama, the Khmer toandakhiat). ¹
6. Adjective. (slang) Excellent, very good. ¹
¹ Source: wiktionary.com
Definition of Killer
1. one that kills [n -S] - See also: kills
Medical Definition of Killer
1.
1. One who deprives of life; one who, or that which, kills.
2.