n.1 a small tower, usu. projecting from the wall of a building as a decorative addition.
2 a low flat usu. revolving armoured tower for a gun and gunners in a ship, aircraft, fort, or tank.
3 a rotating holder for tools in a lathe etc.
Phrases and idioms:
turret lathe capstan lathe.
Derivatives:
turreted adj.
Etymology: ME f. OF to(u)rete dimin. of to(u)r TOWER