killer noun - Definition, pictures, pronunciation and usage notes
https://www.oxfordlearnersdictionaries.com/definition/english/killer
WEBkiller. noun. /ˈkɪlə (r)/. /ˈkɪlər/. a person, an animal or a thing that kills. Police are hunting his killer. Heart disease is the biggest killer in Scotland. an electric insect killer. see also giant-killer, killer …
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