Unauthorized vs Without authorization

When to use each in English, with meaning, register, and examples.

Unauthorized

FormalTop 2,000 (common)

Without authorization

FormalBeyond 10,000 (less common)
Most common: Unauthorized
 UnauthorizedWithout authorization
Pronunciation🇬🇧 //ˌʌnɔːθəˈraɪzd//🇺🇸 //ˌʌnəˈθɔərəɪzd//🇬🇧 //wɪθˈaʊt ɔːθəraɪˈzeɪʃən//🇺🇸 //wɪθˈaʊt ɔˈθɪrəˌzeɪʃən//
MeaningNot having permission or approval.Not having permission to do something.
ExampleHe accessed the database without permission, so his actions were unauthorized.The employee accessed the files without authorization.
RegisterFormalFormal
How commonTop 2,000 (common)Beyond 10,000 (less common)
Collocationsunauthorized access, unauthorized use, unauthorized disclosure, unauthorized personnel, unauthorized transactionsaccess without authorization, act without authorization, enter without authorization
Antonymsauthorized, permitted, sanctioned-
Common mistakesConfusing with 'unauthorized' and 'unapproved'., Using it to describe actions that are just socially unacceptable., Assuming it can be used in informal contexts.Confused with 'unauthorized' which is a single word., Incorrectly using 'with authorization' when intending to say 'without authorization'.
Usage notesUse this term in formal contexts, especially in legal or security discussions. It's not appropriate for casual conversation.Use 'without authorization' in formal contexts like legal or official communications. Avoid in casual conversations.

See it in real clips

Unauthorized
Without authorization

Frequently asked questions: Unauthorized vs Without authorization

What's the difference between Unauthorized and Without authorization?

Unauthorized: Not having permission or approval. Without authorization: Not having permission to do something.

Which is more common: Unauthorized and Without authorization?

Unauthorized is the most common in everyday English.

Can you show an example of each?

Unauthorized: He accessed the database without permission, so his actions were unauthorized. Without authorization: The employee accessed the files without authorization.

Can I use Unauthorized and Without authorization interchangeably?

Not always. Unauthorized and Without authorization are related and overlap in some contexts, but they differ in register, how common they are, and usage, so swapping one for another can change the meaning or tone. Check the differences above before substituting.

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