cuckold UK /ˈkʌ.kəʊld/US /ˈkʌ.koʊld/noun 5verb 1forms 3 noun5 •A man married to an adulterous spouse, especially when he is unaware or unaccepting of the fact.If I never marry, I shall never be a cuckold. — 1546 •A man who is attracted to or aroused by the sexual infidelity of a partner. •A West Indian plectognath fish, Rhinesomus triqueter. •The scrawled cowfish, Acanthostracion quadricornis and allied species. •Synonym of fringed filefish. verb1 •To make a cuckold or cuckquean of someone by committing adultery, or by seducing their partner or spouse."Gave her anything she wanted - her own car, her own bank account, a free leg to amuse herself as she pleased. Of course she hated him for it. Cuckolded him, too, naturally." — 1950 formscuckolded · cuckolding · cuckolds