Floor (5)
'floor' is the definition.
(US term for a floor in a building)
This is all the clue.
(Other definitions for storey that I've seen before include "Layer of house" , "Tier of a building" , "Floor or level in a building" , "rooms on one level" , "Oyster (anag) -- level" .)
'floor' is the definition.
(floor can mean to amaze or shock)
This is the entire clue.
(Other definitions for amaze that I've seen before include "Confound with wonder" , "Flabbergast" , "Floor" , "Surprise greatly, astonish" , "Stupefy" .)
'floor' is the definition.
(both can mean to shock)
This is all the clue.
(Other definitions for stun that I've seen before include "Confuse" , "Knock unconscious" , "Daze, overwhelm" , "Knock out temporarily" , "Render unconscious" .)