'Stunner' definitions:

Definition of 'stunner'

From: WordNet
noun
A very attractive or seductive looking woman [syn: smasher, stunner, knockout, beauty, ravisher, sweetheart, peach, lulu, looker, mantrap, dish]
noun
An unexpected and amazing event; "the stunner was what happened on Saturday"

Definition of 'Stunner'

From: GCIDE
  • Stunner \Stun"ner\, n.
  • 1. One who, or that which, stuns. [1913 Webster]
  • 2. Something striking or amazing in quality; something of extraordinary excellence. [Slang] --Thackeray. [1913 Webster]

Synonyms of 'stunner'

From: Moby Thesaurus