1. To grind, pulverize, or break do

1. To grind, pulverize, or break down into smaller particles in a mill.
2. To transform or process mechanically in a mill.
3. To shape, polish, dress, or finish in a mill or with a milling tool.
4.
a. To produce a ridge around the edge of (a coin).
b. To groove or flute the rim of (a coin or other metal object).