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"unauthorized" vs "unauthorised"

Both 'unauthorised' and 'unauthorized' are correct spellings, but they differ in usage based on regional preferences. 'Unauthorised' is the British English spelling, while 'unauthorized' is the American English spelling.

Last Updated: March 27, 2024

unauthorized

This is the American English spelling of the word.

Use 'unauthorized' in American English to describe something that is not officially approved or permitted.

Alternatives:

  • not authorized

unauthorised

This is the British English spelling of the word.

Use 'unauthorised' in British English to describe something that is not officially approved or permitted.

Alternatives:

  • not authorized

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