Case1  n. 1 instance of something occurring. 2 hypothetical or actual situation. 3 a person's illness, circumstances, etc., as regarded by a doctor, social worker, etc. B such a person. 4 matter under esp. Police investigation. 5 suit at law. 6 a sum of the arguments on one side, esp. In a lawsuit. B set of arguments (have a good case). C valid set of arguments (have no case). 7 gram. A relation of a word to other words in a sentence. B form of a noun, adjective, or pronoun expressing this. 8 colloq. Comical person.  in any case whatever the truth is; whatever may happen. In case 1 in the event that; if. 2 lest; in provision against a possibility (took it in case). In case of in the event of. Is (or is not) the case is (or is not) so. [latin casus from cado fall]