Definition of white hat in English:

white hat

Line breaks: white hat


1Used in reference to a good or moral person, especially the hero in a film, novel, or play: [as modifier]: the two central characters are a cop and a gangster, but don’t expect a simple black-hat/white-hat duality
More example sentences
  • The San Francisco clothing company is widely admired as a ‘white hat’ among multinationals.
  • Here, no one gets to wear the white hat, no one rides contentedly into the sunset, and the loose ends are left satisfyingly unknotted.
  • The cowboy (in white hat, of course) always showed that good triumphed over evil and I truly believe that youngsters subconsciously absorbed the moral force for good inherent in the stories.
1.1 Computing , informal A person who hacks into a computer network in order to test or evaluate its security systems: while security dudes tend to speak in terms of black or white hats, it seems to me that nearly all hats are in varying shades of grey
More example sentences
  • Exploitation of the latest flaw is straightforward, according to Polish white hat hackers iSec, which unearthed both problems.
  • It's operated on the belief that the white hats can be spotted by their exemplary policies and programs and sustainability reports.
  • Among geeks he'd be called a "white hat" hacker - the kind who tinkers with machines out of a desire to learn and explore.


1950s: from the colour of the hat traditionally worn by the good character in westerns. Compare with black hat.

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