From Longman Dictionary of Contemporary Englishstunnerstun‧ner /ˈstʌnə $ -ər/ noun [countable] informal 1 BEAUTIFUL/GOOD-LOOKINGsomeone or something that is very attractive, especially a woman Lucy was a real stunner.2 a situation or event that surprises you
Examples from the Corpus
stunner• Diane hadn't been a stunner, but she'd had a pleasant face and a more than tolerably decent body.• The tantrum she throws on her own front lawn, after De Niro locks her out, is a stunner.• The entire new center-field superstructure is a stunner, and you may interpret that however you wish.• As with all Steven Spielberg productions - visually it's a stunner.• Tuesday's agreement was a stunner.• One of the biggest stunners was the appearance of Zenon Smotrycz. 