Transition

Part of speech: noun (n.)

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. A direct or indirect passing from one key to another; a modulation.

3. A passing from one subject to another. [He] with transition sweet, new speech resumes. Milton.

4. Change from one form to another.