General Definition: 1. Any medium-sized, vertical cylindrical object, such as a pipe, pole, bar, or rod, or any thing or any action directly or indirectly associated with this. As a Noun: 1. A long, round, hollow object, usually made of metal or plastic, through which a liquid or gas can flow. English = pipe. 2. A long, thin, straight object made of metal, wood, or some other hard substance. English = pole, bar, rod.