noun

killer

Translation

killer, murderer, something excellent

The police are searching for the killer.

That last exam question was a killer.

He has a killer smile.

a killer a person or thing that kills A serial killer was active in the city.

a killer ((noun)) an impressive or excellent (noun) She wore a killer dress to the party.

Synonyms: murderer, assassin, slayer

From the verb 'kill' + the agent noun suffix '-er', meaning 'one who does'.

Think of 'kill' + '-er' (like 'teach' + '-er' -> 'teacher'). A 'killer' is 'one who kills'.