drill

A drill is an object used to dig a hole.

Example: He used the drill to make a hole on the wall.

A practice before a major event is called a drill.

Example: Our school often conduct fire drills to train us in case of a real fire.

A drill is a type of primate.

If you drill a hole, you use a drill to make a hole in something.

Example: We must drill six holes in the wood for the screws.

If you drill some information into someone's head, you make them review it again and again until they remember it.

Example: My teacher tried all ways to drill the mathematical concept into my head.