Dictionary

A thin and usually jagged space opened in a previously solid material.

Example: A large crack had formed in the roadway.

A narrow opening.

Example: Open the door a crack.

A sharply humorous comment; a wisecrack.

Example: I didn't appreciate that crack about my hairstyle.

Crack cocaine, a potent, relatively cheap, addictive variety of cocaine; often a rock, usually smoked through a crack-pipe.

Example: crack head

To form cracks.

Example: It's been so dry, the ground is starting to crack.

To break apart under pressure.

Example: When I tried to stand on the chair, it cracked.

To become debilitated by psychological pressure.

Example: Anyone would crack after being hounded like that.

To break down or yield, especially under interrogation or torture.

Example: When we showed him the pictures of the murder scene, he cracked.

Highly trained and competent.

Example: Even a crack team of investigators would have trouble solving this case.

Excellent, first-rate, superior, top-notch.

Example: She's a crack shot with that rifle.