case

1 case /ˈkeɪs/ noun
plural cases
1 case
/ˈkeɪs/
noun
plural cases
Britannica Dictionary definition of CASE
1 
[count] : a situation or occurrence that is an instance or example of something
2 
[count] : a situation that is being investigated or managed by someone (such as a police officer or social worker) in an official way
3 
[count] grammar : a form of a noun, pronoun, or adjective showing its relationship to other words in a sentence
4 
the case : what actually exists or happens
5 
[count] law : a situation that will be talked about and decided in court
◊ The phrase I rest my case can be used to say that you have finished an argument or to suggest that something proves that what you are saying is true.
— see also test case
6 
[count] : a convincing argument
7 
[count]
a  : an occurrence of a disease or an injury
b  : an occurrence of discomfort, fear, etc.
8 
[singular] : a particular person and his or her condition or character — see also basket case, head case

in any case

— used to indicate that something is true or certain regardless of what else has happened or been said

in case

1 
: for the purpose of being ready for something that might happen
2 
— used to talk about something that might have happened or that might be true

in case of

: if (something) happens

in that case

: when that is considered : because of that

on/off your case

informal
◊ Someone who is always or frequently criticizing you or telling you what to do is on your case and won't get off your case.
2 case /ˈkeɪs/ noun
plural cases
2 case
/ˈkeɪs/
noun
plural cases
Britannica Dictionary definition of CASE
[count]
1 
: a box or container to hold something — see also carrying case
2 
: the contents of a box
3 case /ˈkeɪs/ verb
cases; cased; casing
3 case
/ˈkeɪs/
verb
cases; cased; casing
Britannica Dictionary definition of CASE
[+ object]
: to study or watch (a house, store, etc.) with plans to rob it — often used in the phrase case the joint