white hat

noun

Definition of white hat

  1. 1 :  one who is admirable and honorable

  2. 2 :  a mark or symbol of goodness could use a few more guys in white hats — Robert Christgau

  3. 3 :  a hacker who tests computer systems for possible vulnerabilities so that they can be fixed Chu, 33, is part of a fraternity known as “penetration testers” or “ethical hackers,” a group of experts who are hired to hack into computer systems or find other ways to gain access. These so-called “white hats” will spend days or weeks searching company systems to come up with recommendations for fortifying corporations against such threats. — Greg Wiles — compare black hat

Origin and Etymology of white hat

from the white hats stereotypically worn by law-abiding characters in movie westerns

Learn More about white hat


Seen and Heard

What made you want to look up white hat? Please tell us where you read or heard it (including the quote, if possible).

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!

WORD OF THE DAY

to fight against or to call in question

Get Word of the Day daily email!

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!