The act or process of moving through, under, over, or past something on the way from one place to another. A narrow way, typically having walls on either side, allowing access between buildings or to different rooms within a building; a passageway. The process of transition from one state to another. A short extract from a book or other printed material. A movement performed in advanced dressage and classical riding, in which the horse executes a slow elevated trot, giving the impression of dancing. Subject (a strain of microorganisms or cells) to a passage.