Unauthorized

Unauthorized

Adjective · /ˌʌnˈɔːθəraɪzd/ · done without official permission or approval

Definition

Unauthorized means lacking the required permission, approval, or authority. An unauthorized action is one taken without the consent of the relevant authority — whether that is a manager, a system administrator, a legal body, or a property owner. The word is formal and precise: it does not simply mean not allowed in principle; it means the specific authorization that would make something permitted has not been granted. In computing, an unauthorized access attempt is the foundational concept behind login security and API authentication.

Origin

Formed from the prefix un- meaning not, plus the past participle authorized. Authorize comes from the Medieval Latin auctorizare, from Latin auctor — meaning originator, promoter, or one who gives authority. The Latin root connects to augere, meaning to increase or enlarge — so an author or authority is literally one who makes things grow or advance. Unauthorized negates the granting of that fundamental permission, withdrawing the authority that would make an action legitimate.