A drill with a central pin or projection to enter a hole, for enlarging the hole, or for sinking a recess for the head of a bolt, etc.; a counterbore.

A heavy drill consisting of a bit powered by compressed air, used e.g. for breaking tarmac.

A machine tool for drilling slots, in which the work or tool has a lateral motion back and forth. / A drilling machine in which the spindle holder can be adjusted laterally.

(basketball) A practice drill where a line of players improve their rebounding skills by catching a rebound in the air, tossing the ball back against the backboard before landing, and returning to the end of the line to go again.

plural of drilling rig

A hand-held drill powered by electric motor.

A small, high-speed drill used during dental procedures.

A small, high-speed drill used during dental procedures.

An exercise done to improve someone's swordfighting skill

plural of drill hall