Infidelity

/ˌɪn.fɪˈdɛl.ɪ.ti/

Meaning & Definition

noun
The state of being unfaithful to a spouse or romantic partner.
Her infidelity shattered their marriage and led to a painful divorce.
The act of cheating or being disloyal in a romantic relationship.
He struggled to forgive the infidelity that had occurred during their relationship.
Lack of fidelity to a moral obligation or duty.
The politician's infidelity to his promises cost him the trust of his constituents.

Etymology

From Latin 'infidelitas', meaning 'unfaithfulness'.

Common Phrases and Expressions

cheating heart:
A heart that is unfaithful, particularly in a romantic relationship.
playing the field:
Dating multiple people without commitment to any one person.
two-timer:
A person who deceives a partner by being romantically involved with another.

Related Words

Slang Meanings

home-wrecker
She’s known as a home-wrecker for breaking up marriages.
cheater
He’s such a cheater, always sneaking around behind her back.
side piece
He has a side piece he meets when he’s out of town.