Hook

1. A catch for locking a door or gate. Hook up the gate after you go through it.
2. A sharp curve or crook; a shape resembling a hook. He put a worm on the hook and began to fish.
3. A golf stroke that sends the ball to the left of a right-handed player or to the right of a left-handed player. He hooked the ball badly to the left.
4. To cause to become addicted. He became hooked on cocaine.