Definition of "Supergirl"

Supergirl

proper noun
countable and uncountable, plural Supergirls
1. A fictional comic-book superheroine with superhuman strength and speed, x-ray vision, and the ability to fly.
  Quotations
  With Supergirl strength, I stacked an enormous chest against it. It wouldn't stop visitors from strolling in. But it might slow them up some. My candle winked out as I fell back on my bed.
  2001, Lynne Kositsky, A Question of Will, Roussan Pub Incorporated
  "Well, you may be fooling yourself and your aid and a lot of the voters and the Tribune and everybody else, but you're not fooling me!" Sue grabbed the in-flight magazine and glared at it, like Supergirl using her x-ray vision. Hot tears flowed […]
  2006, Randy C. Alcorn, Deadline, Multnomah Books, page 250
  “I was as bug-eyed as a frog, seeing everything like it as in slow-motion in a movie. Not every day some kook points a gun at me. I'm really glad you've got that Supergirl speed.”
  2012, Trish Milburn, White Witch, Bell Bridge Books , page 73, referring to someone with magical powers
  Obviously and most certainly, Carmen did not see the actions she described while listening outside with her ear glued to to Marilyn's door, not unless she had both eyes on one side of her head like a Flounder or an alien and she enjoyed x-ray vision like Supergirl.
  2019, Donald R. McGovern, Murder Orthodoxies: A Non-Conspiracist's View of Marilyn Monroe's Death, page 129