Definitionen
1.NounA splinter, fragment or chip, especially of stone.
2.NounA process of weathering, aging, or other wear that involves the crumbling of the substrate."The failure of this bearing involved spall under high load.; The inspection of this bridge abutment found extensive spall."
3.VerbTo break into fragments or small pieces.
4.VerbTo undergo weathering, aging, or other wear that involves the crumbling of the substrate."When the bearing race spalled under high load, it led to the failure of the bearing.; Once the concrete had spalled extensively, the bridge could no longer pass an honest inspection."
5.VerbTo reduce, as irregular blocks of stone, to an approximately level surface by hammering.
6.NounThe shoulder.