STOREY (equivalents are Fr. etage, Ital. piano, Ger. Stock)  , the term in architecture given to the floor of a building, and employed generally when referring to a number of floors one above the other; thus a building may be of two, three or more storeys high . It used to be applied to a series of apartments on one floor, which are now generally known as a flat . " Storey " or " story " is from O . Fr. estoree, building, estorer, to build, equip, furnish, store, from Lat. staurare, only seen in compound instaurare, to repair, restore, ultimately from root sta, to stand .