1. Passage from one place or state to another; charge; as, the transition of the weather from hot to cold. There is no death, what seems so is transition. Longfellow. 2. (Mus.) A direct or indirect passing from one key to another; a modulation. 3. (Rhet.) A passing from one subject to another. [He] with transition sweet, new speech resumes. Milton. 4. (Biol.) ...