English dictionary, thesaurus, translations & etymology
FreeDict.com
verb B2 Upper-Intermediate Uncommon

infect

ihn-FEHKT

Infect (verb) means to pass a disease-causing germ or virus into a person, animal, or plant. Example: “The mosquito bite infected him with malaria.”

verb
1
To pass a disease-causing germ or virus into a person, animal, or plant.
"The mosquito bite infected him with malaria."
"One sick worker infected half the office within a week."
2
To spread a feeling or attitude to other people.
"Her enthusiasm for the project infected the whole team."

How to use infect

Learner’s notes

In plain EnglishTo pass on something harmful (a disease) or, more loosely, to spread a mood or feeling to others.

Common pairings
infect with a virus infect others enthusiasm infected

Word forms

infected past tense, infects singular

Study it as flashcards or scroll it in Flow — saved to your collection.
Test yourself on “infect” A quick quiz — meaning, synonyms & usage

Fill the gap

Can you complete this real example?

The mosquito bite _____ him with malaria.

Etymology

From Latin infectus, past participle of inficere, "to dye, taint, spoil."

Origin: Latin

Antonyms

Related words

Rhymes for infect

See all rhymes for infect →

Frequently asked questions

What does “infect” mean?

The word “infect” means to pass a disease-causing germ or virus into a person, animal, or plant. In plain terms, to pass on something harmful (a disease) or, more loosely, to spread a mood or feeling to others.

How do you pronounce “infect”?

“Infect” is pronounced ihn-FEHKT (/ɪnˈfɛkt/ in IPA).

How do you use “infect” in a sentence?

Here is “infect” used in a sentence: “The mosquito bite infected him with malaria.”

What is the opposite of “infect”?

The opposite of “infect” — its antonyms — is disinfect.

What part of speech is “infect”?

“Infect” is a verb.

Where does the word “infect” come from?

The word “infect” comes from Latin. From Latin infectus, past participle of inficere, "to dye, taint, spoil.".

Is “infect” a common word?

“Infect” is an uncommon word in modern English, usually learned at around the B2 level.

How many meanings does “infect” have?

“Infect” has 2 distinct senses listed in this dictionary. The most common is: to pass a disease-causing germ or virus into a person, animal, or plant.

People also searched

Definitions: FreeDict original editorial