What does "infidelity" mean?
Unfaithfulness in a marriage or an intimate (sexual or romantic) relationship: practice or instance of having a sexual or romantic affair with someone other than one's spouse, without the consent of the spouse.
Infidelity
/ˌɪnfɪˈdɛlɪti/ noun
noun ·Moderate ·College level
Meaning at a glance
- Primary sense: Unfaithfulness in a marriage or an intimate (sexual or romantic) relationship: practice or instance of having a sexual or romantic affair with someone other than one's spouse, without the consent of the spouse.
- Grammar: infidelity is listed as noun.
- Nearest alternatives: unfaithfulness, adulteries, adulterous affair, adultery.
- Useful contrasts: marital vow, allegiances, belief.
- Usage evidence: She never forgave him the infidelity and held it over him every chance that she got.
How to use "infidelity"
- Start with the primary definition, then check the part of speech before placing the word in a sentence.
- Compare nearby synonyms to make sure "infidelity" carries the exact meaning, tone, and strength you need.
- 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 "infidelity" 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 "infidelity" as the right word for your sentence.
If your draft is formal, technical, persuasive, or sensitive, compare "infidelity" 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 "infidelity" is acting as noun 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 "unfaithfulness" 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 "infidelity", 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
Noun
- 1 Unfaithfulness in a marriage or an intimate (sexual or romantic) relationship: practice or instance of having a sexual or romantic affair with someone other than one's spouse, without the consent of the spouse. countable, uncountable
"Your friends tell you rumors about your girlfriend's infidelity or you remember being broken up around the time the baby was conceived."
- 2 the quality of being unfaithful wordnet
- 3 Unfaithfulness in some other moral obligation. countable, uncountable
"It was disastrous that England's infidelity towards Frederick the Great — which no one, not even a German, condemned more strongly than did William Pitt — had to affect one of the most popular heroes of our national history."
- 4 Lack of religious belief. archaic, countable, uncountable
"The means used to this purpose are partly didactical, and partly protreptical; demonstrating the truth of the gospel, and then urging the professors of those truths to be stedfast^([sic]) in the faith, and to beware of infidelity."
Synonyms
All synonymsAntonyms
Example
"She never forgave him the infidelity and held it over him every chance that she got."
Common questions
What is a synonym for "infidelity"?
Common synonyms include: unfaithfulness, adulteries, adulterous affair, adultery, affair, agnosticism.
How do you use "infidelity" in a sentence?
She never forgave him the infidelity and held it over him every chance that she got.
How do you pronounce "infidelity"?
Pronounced /ˌɪnfɪˈdɛlɪti/.
Etymology
From Middle English infidelite, from Middle French infidelité (modern French infidélité) and its etymon Latin īnfidēlitās. Equivalent to infidel + -ity.