IPA: /ˈstʌnər/
KK: /ˈstʌnər/
A person or thing that is very impressive or attractive, often causing surprise or admiration.
She walked into the room like a stunner, turning everyone's heads.
Stunner → It is formed from "stun" (from Old English *stunian*, meaning to make senseless or dazed) and the suffix "-er" (meaning a person who). A stunner is a person or thing that causes someone to be dazed or amazed.
Think of someone or something that makes you feel dazed or amazed — that's what a stunner does.