1. In grammar, a grammatical case used in some languages to denote the subject performing an action, particularly in ergative-absolutive language systems
In certain Caucasian languages, the active case marks the agent of the verb.
Em algumas línguas caucasianas, o caso ativo marca o agente do verbo.
2. In medicine or law, a case that is currently under active investigation, treatment, or legal proceedings
The detective has fifty active cases on her desk.
A detetive tem cinquenta casos ativos em sua mesa.