1

killer

play
noun kill·er \ ˈki-lər \

Definition of killer

1 :one that kills
3 a :one that has a forceful, violent, or striking impact
b :one that is extremely difficult to deal with

Examples of killer in a Sentence

  1. Heart disease is the leading killer of both men and women.

  2. The chemical is used as a weed killer.

Recent Examples of killer from the Web

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'killer.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

First Known Use of killer

15th century


2

killer

adjective

Definition of killer

1 :strikingly impressive or effective
  • a killer smile
  • a killer résumé
2 :extremely difficult to deal with
  • a killer fastball
; also :causing death or devastation
  • a killer tornado

Examples of killer in a Sentence

  1. killer viruses that claimed millions of lives

  2. a killer exercise program guaranteed to whip you into shape

First Known Use of killer

1951


KILLER Defined for English Language Learners

killer

play
noun

Definition of killer for English Language Learners

  • : a person or thing that kills someone or something

  • : something that is very difficult


killer

adjective

Definition of killer for English Language Learners

  • : causing death or destruction

  • : very impressive or appealing

  • : very difficult


KILLER Defined for Kids

1

killer

play
noun kill·er \ ˈki-lər \

Definition of killer for Students

:someone or something that takes the life of a person or animal

2

killer

adjective

Definition of killer for Students

1 :very impressive or effective
  • a killer smile
2 :very difficult
  • a killer exam
3 :causing death or ruin a killer tornado


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agreeable, attractive, or delicious

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