What is the meaning of transition?

noun

• The act of passing from one state or place to the next.
  • synonyms: passage
• An event that results in a transformation.
  • synonyms: conversion, changeover
• A change from one place or state or subject or stage to another.
• A musical passage moving from one key to another.
  • synonyms: modulation
• A passage that connects a topic to one that follows.

verb

• Cause to convert or undergo a transition.
  • usage: "the company had to transition the old practices to modern technology"
• Make or undergo a transition (from one state or system to another. )
  • usage: "The airline transitioned to more fuel-efficient jets"; "The adagio transitioned into an allegro"