Infect

/ɪnˈfɛkt/ adj, verb

adj, verb ·Common ·High school level

Meaning at a glance

  • Primary sense: To bring (the body or part of it) into contact with a substance that causes illness (a pathogen), so that the pathogen begins to act on the body; (of a pathogen) to come into contact with (a body or body part) and begin to act on it.
  • Grammar: infect is listed as adj, verb.
  • Nearest alternatives: abuse, activate, adulterate, affect.
  • Useful contrasts: autoclave, decontaminating, disinfecting.
  • Usage evidence: The virus can easily infect a healthy person.

How to use "infect"

  1. Start with the primary definition, then check the part of speech before placing the word in a sentence.
  2. Compare nearby synonyms to make sure "infect" carries the exact meaning, tone, and strength you need.
  3. Use the example sentence as a context check. If your sentence uses the word differently, confirm that the grammar still fits.

Meaning check

  • Does the word fit the sentence's grammar?
  • Does it match the intended tone rather than only the dictionary definition?
  • Would a simpler synonym be clearer for the reader?
  • Is there enough surrounding context to prevent ambiguity?

Source and review context

This entry combines structured lexical data with WordToolSet review checks. Definitions, examples, synonyms, and usage notes may come from different source tables, so the page is designed to show evidence from more than one angle before you rely on "infect" in a final draft.

If a word has several senses, prefer the sense that matches your sentence's grammar and surrounding context. A correct definition can still be the wrong choice when the sentence needs a different register, emphasis, or level of specificity.

Before you rely on this definition

Read the first definition as a starting point, then check the example, synonyms, and part of speech before treating "infect" as the right word for your sentence.

If your draft is formal, technical, persuasive, or sensitive, compare "infect" with a nearby alternative so the final choice matches both meaning and reader expectation.

Compare nearby meanings

  • Use synonyms when you need a softer, stronger, simpler, or more specific word.
  • Use antonyms to check the boundary of the meaning and avoid accidental contrast.
  • Use the example sentence to confirm the word behaves naturally in context.
  • Keep the original wording when a replacement adds complexity without improving precision.

Definition decision workflow

1. Identify the role

Check whether "infect" is acting as adj, verb in your sentence. A definition is only useful when the grammar matches the way the word is being used.

2. Test the nearest option

Compare it with "abuse" and other nearby choices to see whether the sentence needs a softer, stronger, or more familiar word.

3. Confirm with context

Use the example sentence below as an evidence check, then read your own sentence out loud to catch tone or rhythm problems.

Review note: Definition pages are checked for source coverage, sentence evidence, synonym support, and editorial insight before they are treated as approval-ready pages. If the evidence is too thin, the page remains available to users but is kept out of the approval-facing indexed inventory.

Final meaning check

Before publishing a sentence with "infect", ask whether the word helps the reader understand the idea faster. A precise word should reduce confusion, not simply make the sentence look more polished.

When the definition, synonym evidence, and example context point in the same direction, the word is usually a safer choice. When they conflict, revise the sentence or choose a clearer alternative.

Definitions

Verb
  1. 1
    To bring (the body or part of it) into contact with a substance that causes illness (a pathogen), so that the pathogen begins to act on the body; (of a pathogen) to come into contact with (a body or body part) and begin to act on it. transitive

    "Not everyone will be infected when an epidemic strikes."

  2. 2
    contaminate with a disease or microorganism wordnet
  3. 3
    To contaminate (an object or substance) with a pathogen. transitive
  4. 4
    communicate a disease to wordnet
  5. 5
    To make somebody enthusiastic about one's own passion, or to communicate a feeling to others, or a feeling communicating itself to others. transitive

    "Her passion for dancing has infected me."

Show 2 more definitions
  1. 6
    affect in a contagious way wordnet
  2. 7
    corrupt with ideas or an ideology wordnet
Adjective
  1. 1
    Infected. not-comparable, obsolete

    "And in the imitation of these twain, / Who, as Ulysses says, opinion crowns / With an imperial voice, many are infect."

  2. 2
    Representing an action not yet completed. not-comparable, rare

Example

"The virus can easily infect a healthy person."

Common questions

What does "infect" mean?

To bring (the body or part of it) into contact with a substance that causes illness (a pathogen), so that the pathogen begins to act on the body; (of a pathogen) to come into contact with (a body or body part) and begin to act on it.

What is a synonym for "infect"?

Common synonyms include: abuse, activate, adulterate, affect, afflict, aggravate.

How do you use "infect" in a sentence?

The virus can easily infect a healthy person.

How do you pronounce "infect"?

Pronounced /ɪnˈfɛkt/.

Etymology

Etymology 1

From Middle French infect, from Latin infectus, perfect passive participle of inficiō (“dye, taint”).

Etymology 2

Borrowed from Latin īnfectus, equivalent to in- (“not”) + factus, perfect passive participle of faciō (“to do, make”).

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