1. In grammar, a subject that is not clearly specified or identified in a sentence; often implied rather than explicitly stated
In the sentence 'It is raining,' the subject is undefined because 'it' does not refer to a specific noun.
Na frase 'Está chovendo', o sujeito é indefinido porque não se refere a um substantivo específico.
2. A topic or issue that lacks clear definition or boundaries
The project's focus remained an undefined subject throughout the meeting.
O foco do projeto permaneceu um sujeito indefinido durante toda a reunião.