1.  show window(n = noun.state) showcase - a setting in which something can be displayed to best effect; "it was a showcase for democracy in Africa"
is a kind of background, scope, setting

2.  show window(n = noun.artifact) display window, shop window, shopwindow - a window of a store facing onto the street; used to display merchandise for sale in the store;
is a kind of window
is a part of shopfront, storefront

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