Wiktionary
case in point
n. (context idiomatic English) An example that illustrates a point.
WordNet
case in point
n. an example that is used to justify similar occurrences at a later time [syn: precedent]
Usage examples of "case in point".
The Five-Year Plans that had made the Soviet Union an industrial match for Germany were a case in point.
Before that, there was a huge hype about how important the vote is, of which the Lewis column that you mentioned is a case in point.
My own apartment, to take a case in point, was a sort of hermit's cell in which one would have been hard put to it to swing a cat, even a smaller one than Augustus, not of course that one often wants to do much cat-swinging.