A hat that is white in color; a literal piece of headwear made of white material.
2.
United StatesGlobalneutralinformal
A character or person who symbolizes goodness, morality, or the heroic role, especially as depicted by wearing a white hat in classic Western films and related imagery.
3.
GlobalInternettechnicalinformal
An ethical computer-security specialist who probes systems to identify vulnerabilities with permission, commonly called a 'white-hat hacker'.
4.
Globalneutralformal
A person or organization acting in an ethical, legitimate, or benevolent manner in contrast to an adversary or exploiter.