transition

Noun

• a passage that connects a topic to one that follows

• a musical passage moving from one key to another

• a change from one place or state or subject or stage to another

• an event that results in a transformation

• the act of passing from one state or place to the next

Verb

• 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
    

• cause to convert or undergo a transition
  • the company had to transition the old practices to modern technology
    

Related words

• Synonyms: 
  modulation , conversion , changeover , passage