Definition of case:

part of speech: noun

That which falls, comes, or happens; an event; condition or state in which any person or thing may chance to be; a question for discussion; a cause in a court; the inflection of nouns; in case, if it should so happen; in good case, in good condition or health of body.

part of speech: verb

To cover in; to put in a case or box.

part of speech: noun

A covering; a box; a sheath; a frame; a certain quantity.