infidelity

[in-fi-del-i-tee]

noun

plural

infidelities 

1. marital disloyalty; adultery.

2. unfaithfulness; disloyalty.

3. lack of religious faith, especially Christian faith.

4. a breach of trust or a disloyal act; transgression.

infidelity

/ ˌɪnfɪˈdɛlɪtɪ /

noun

1. lack of faith or constancy, esp sexual faithfulness

2. lack of religious faith; disbelief

3. an act or instance of disloyalty

Word History and Origins

Origin of infidelity¹

First recorded in 1375–1425; late Middle English, from Latin infidēlitās; equivalent to infidel + -ity

Example Sentences

Her despairing stories about infidelity and lies unfold across 14 chapter-like songs.

Read more on The Wall Street Journal

Written and recorded in just 10 days, it's a real-time account of her shock, grief, confusion and anger, as her four-year marriage to actor David Harbour fell apart, amid accusations of infidelity.

Read more on BBC

Numerous flashbacks include Lobb’s diary entries, which lay bare his marital infidelity and family abandonment for a second marriage to a woman not much older than his children.

Read more on Los Angeles Times

This is "a small step for women to speak out about the infidelity and violence they face", she says.

Read more on BBC

She also raps about his apparent infidelity, commenting that she "could've cheated too".

Read more on BBC

Related Words

• adultery 
• affair 
• betrayal 
• duplicity 
• treachery