For a change, in this case, he was telling the truth. It is not the case that every unfamiliar phrase is an idiom. In case of fire, break glass. [sign on fire extinguisher holder in public space]
The definition of a showcase is a display or a case for displaying.
A glass-paneled cabinet or glass display case for art objects, curios, etc.
Find another word for display-case. In this page you can discover 3 synonyms, antonyms, idiomatic expressions, and related words for display-case, like: case, showcase and vitrine.