a small piece of material used to mend a tear or break, to cover a hole, or to strengthen a weak place: patches at the elbows of a sports jacket.

a piece of material used to cover or protect a wound, an injured part, etc.: a patch over the eye.

Also called skin patch, transdermal patch. an adhesive patch that applies to the skin and gradually delivers drugs or medication to the user: using a nicotine patch to try to quit smoking.

any of the pieces of cloth sewed together to form patchwork.

a small piece, scrap, or area of anything: a patch of ice on the road.