white hat

[ hwahyt hat, wahyt ]
/ ˈʰwaɪt ˈhæt, ˈwaɪt /

noun Informal.

a virtuous hero, especially in a cowboy movie; good guy.
Digital Technology. a hacker who violates the security of a system with the knowledge and consent of the owner or developer in order to test the code, without malicious intent.

Nearby words

  1. white gold,
  2. white goods,
  3. white guilt,
  4. white gum,
  5. white hake,
  6. white heat,
  7. white hole,
  8. white hope,
  9. white horse,
  10. white house

Compare black hat.

Related formswhite-hat, white-hat·ted, adjective

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for white hat

British Dictionary definitions for white hat

white hat


  1. a computer hacker who is hired by an organization to undertake nonmalicious hacking work in order to discover computer-security flaws
  2. (as modifier)a white-hat hacker Compare black hat
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012