n.
Pronunciation: ' r ə -b ə l
Function: noun
Etymology: Middle English robyl
Date: 14th century
1 a : broken fragments (as of rock) resulting from the decay or destruction of a building <fortifications knocked into rubble ― C. S. Forester> b : a miscellaneous confused mass or group of usually broken or worthless things
2 : waterworn or rough broken stones or bricks used in coarse masonry or in filling courses of walls
3 : rough stone as it comes from the quarry