1. A subject, issue, or topic that has not been clearly defined, identified, or described in detail
The contract mentioned an unspecified matter that would be resolved later.
O contrato mencionava um assunto não especificado que seria resolvido posteriormente.
2. Something vague or indefinite that lacks precise definition or clarification
She declined to discuss the unspecified matter with the media.
Ela recusou-se a discutir o assunto não especificado com a mídia.