Meaning of the word unfaithfulness in English

What does unfaithfulness mean in English? Explore the meaning, pronunciation, and specific usage of this word with Lingoland.

unfaithfulness

US /ʌnˈfeɪθ.fəl.nəs/
UK /ʌnˈfeɪθ.fəl.nəs/

Noun

the fact of having a sexual relationship or experience with a person who is not your husband, wife, or usual sexual partner:

Example:
His sister accused their father of adultery and unfaithfulness.