The bark of the cork oak, which is very light and porous and used for making bottle stoppers, flotation devices, and insulation material.

A bottle stopper made from this or any other material.

“Snobs feel it's hard to call it wine with a straight face when the cork is made of plastic.”

An angling float, also traditionally made of oak cork.

To seal or stop up, especially with a cork stopper.

To blacken (as) with a burnt cork

To leave the cork in a bottle after attempting to uncork it.