Definition of "bombshell"

bombshell

noun
plural bombshells
1. A bomb or artillery shell designed to explode on impact.
2. (figurative) Something that is very surprising, shocking, amazing or sensational.
  Quotations
  Singer and Jeffreys had focused their attention on cancer risk, but the bombshell of the report was the danger to children.
  2010, Naomi Oreskes, Erik M. Conway, chapter 5, in Merchants of Doubt
3. (by extension) Someone who is very attractive; a sex symbol.
  Quotations
  The singer once identified by her shock of green hair has gone blonde and full bombshell, swapping her trademark sweats for a style more domme than deb: pink Gucci corset and skirt over Agent Provocateur skivvies, accessorized with latex gloves and leggings.
  2021 May 4, Ruth La Ferla, “On That Bombshell Billie Eilish Cover for British Vogue”, in The New York Times‎