A passage, in architecture, is a narrow room, most often called a hall, that serves to provide access to other rooms.
A passage, in geography, is another term for a strait, which is a narrow channel of water that connects two larger bodies of water. The terms strait, channel, and passage are synonymous and are usually interchangeable.
In music a passage is what is often called a section of music but may refer to smaller portions such as a period or phrase.
