Case = something you store or carry things in. “The lawyer carried a black leather brief case into the courtroom.”
Case = a case is a collection of information about a particular instance of something. “The lawyer spoke to his clients about the case before entering the courtroom.”
Case = To observe a place to familiarize yourself with its day to day in preparation for criminal activity (often robbery). “Judging from the security footage, those men cased the joint hours before robbing it.”
