1 any of the parts into which a building is divided horizontally; the whole of the rooms etc. having a continuous floor (a third-storey window; a house of five storeys).
2 a thing forming a horizontal division.
Derivatives:
-storeyed (in comb.) (also -storied).
Etymology: ME f. AL historia HISTORY (perh. orig. meaning a tier of painted windows or sculpture)
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storey, storeyedUseful english dictionary. 2012.