cuckold
1. [ verb ] (sexuality) be sexually unfaithful to one's partner in marriage
Synonyms: wander betray cheat cheat_on
Examples:

"She cheats on her husband" "Might her husband be wandering?"

Related terms: deceive twotime play_around two-time
2. [ noun ] (sexuality) a man whose wife committed adultery
Related terms: husband cheat_on