Meanings
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1
noun
A person who kills another person.
The police are searching for the killer.
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2
noun
Something that causes death.
Heart disease is the biggest killer in the country.
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3
noun
Something very difficult or exhausting (informal).
That final exam was a real killer.
Thesaurus
Synonyms
2
noun
· something that causes death.
cause of death
Opposites
Common collocations
Etymology
From Middle English killer, kyller. By surface analysis, kill + -er.
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