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Definition of infect

infect

/ɪnˈfɛkt/
in · fect

Adverb:infectiously
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Adjective:infectious
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Past Simple:infected
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Past Participle:infected
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Present Participle:infecting
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infect Lexical Profile

infect Game Scores & Validity

• verb

1

To affect a person, organism, or bodily tissue with a disease-causing microorganism or pathogen.

Example

"A single sneeze in an enclosed room can infect several people with the seasonal flu virus."


2

To infiltrate or corrupt a computer system, network, or digital file with malicious software.

Example

"Opening an attachment from an unknown sender can quickly infect your laptop with spyware."


3

To imbue or influence others with a particular feeling, mood, or attitude in a way that spreads rapidly.

Example

"Her boundless enthusiasm for the community garden project soon began to infect the entire neighborhood."

Synonyms
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Antonyms
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• Rhymes for infect

Word Origin & Etymology

Borrowed from Middle French infecter or directly from Latin infectus, the past participle of inficere ('to dye, stain, or taint'), formed from in- ('into') and facere ('to make or put').

Cite this Entry


Wordmom. (2026). Definition of Infect. In Wordmom Dictionary. Retrieved Nov 5, 2026, from https://wordmom.com/dictionary/infect
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