infect

verb in·fect \ in-ˈfekt \
Updated on: 6 Nov 2017

Definition of infect

transitive verb
1 :to contaminate with a disease-producing substance or agent (such as bacteria)
2 a :to communicate a pathogen or a disease to
b of a pathogenic organism :to invade (an individual or organ) usually by penetration
c of a computer virus :to become transmitted and copied to (a device, such as a computer)
3 a :contaminate, corrupt
  • the inflated writing that infects such stories
b :to work upon or seize upon so as to induce sympathy, belief, or support
  • trying to infect their salespeople with their enthusiasm

infector

play \in-ˈfek-tər\ noun

Examples of infect in a Sentence

  1. If you're sick you should stay home to avoid infecting other people in the office.

  2. The virus has infected many people.

  3. They were unable to prevent bacteria from infecting the wound.

  4. Her enthusiasm has infected everyone.

  5. The virus has infected many computers.

  6. All the computers in the office were infected by the same virus.

Recent Examples of infect from the Web

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

Origin and Etymology of infect

Middle English, from Latin infectus, past participle of inficere, from in- + facere to make, do — more at do


INFECT Defined for English Language Learners

infect

verb

Definition of infect for English Language Learners

  • : to cause (someone or something) to become sick or affected by disease

  • : to cause (someone) to feel an emotion

  • of an emotion : to spread to (other people)


INFECT Defined for Kids

infect

verb in·fect \ in-ˈfekt \

Definition of infect for Students

infected; infecting
1 :to pass on or introduce a germ, illness, or disease to :to cause sickness in
  • Don't infect me with your cold.
  • The bacteria can infect wounds.
2 :to cause to share similar feelings
  • Her enthusiasm infects the other players.

Medical Dictionary

infect

transitive verb in·fect \ in-ˈfekt \

medical Definition of infect

1 :to contaminate with a disease-producing substance or agent (as bacteria)
2 a :to communicate a pathogen or a disease to
b of a pathogenic organism :to invade (an individual or organ) usually by penetration — compare infest


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to praise usually to excess

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