white hat
Proposed by a contributor, not yet supported by evidence.
Meaning · English
A computer security expert who helps organizations protect themselves
Literally: a white hat
Where it’s used:
Used
Widespread English
Examples
Tunney and Daine squared up to each other like the black - hat and white - hat cowboys.
British National Corpus sentence via the MAGPIE corpus (CC BY 4.0, retrieved 2026-07-30)
Sources & notes
Listed in Wiktionary’s “English idioms” category (retrieved 2026-07-29); definition pending editorial review. Definition drafted by AI (@cf/meta/llama-3.3-70b-instruct-fp8-fast) and auto-approved by rule on 2026-07-31; pending editor spot-check.
Common questions
What does “white hat” mean?
A computer security expert who helps organizations protect themselves Literally: a white hat
Is “white hat” formal or informal?
No register label has been reviewed yet — treat it as neutral and check the usage notes above.