Transition (music) definition

(1) The act of passing from one state or place to the next

(2) A passage that connects a topic to one that follows

(3) A musical passage moving from one key to another

(4) A change from one place or state or subject or stage to another

(5) An event that results in a transformation

(6) Make or undergo a transition (from one state or system to another)

"The airline transitioned to more fuel-efficient jets"

"The adagio transitioned into an allegro"

(7) Cause to convert or undergo a transition

"The company had to transition the old practices to modern technology"