BICYCLE, n. A two-wheeled vehicle, self-propelled, requiring balance. Also: the subject of a serious conversation held between two men in armchairs at an hour when only the lamp is awake. Also: an object entirely absent from the room in which it is the most present thing. See also: CONSULTATION, LATE; GLASS, SECOND; HARBOUR (GLIMPSED); QUESTION, EXTREMELY IMPORTANT; STARS, UNBOTHERED.