Cap

A covering of metal or of tarred canvas at the end of a rope to prevent fraying. The upper part of a journal box. The terminal section of a pipe having a plug at the end. A horizontal timber beam resting on and joining the heads of a row of piles or timbers. The top of a column. The part connecting a pump-rod with the working beam. Also a container for an explosive used in blasting. To cap or to cover.