the world > relative properties > measurement > the scientific measurement of volume > measure(s) of capacity > [noun] > specific liquid or dry units > cup as unit (3)
as much as a teacup will contain.
Cookery (chiefly North American). A measure of capacity equal to the amount it takes to fill a cup; spec. a standard measure of eight American…
North American. Cookery. A measure of one half pint or eight fluid ounces.