Meaning of the word "open marriage" in English

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

open marriage

US /ˈoʊ.pən ˈmer.ɪdʒ/
UK /ˈəʊ.pən ˈmær.ɪdʒ/
"open marriage" picture

Noun

a marriage in which both partners agree that each may have sexual relations with others

Example:
They decided to have an open marriage to explore their individual needs.
An open marriage requires a high level of trust and communication.