Sentence:  Finding the key under his <WSD>shoe</WSD> , he started the engine , and while it warmed up he turned to her standing there in the dripping fog , and said , `` Defrost the refrigerator '' . 
Meaning of the word marked with <WSD> tags:  footwear shaped to fit the foot (below the ankle) with a flexible upper of leather or plastic and a sole and heel of heavier material