mass noun
1- the process or a period of changing from one state or condition to another过渡, 转变, 变革; 过渡期, 转型期：
students in transition from one programme to another
由一课程向另一课程过渡的学生
count noun a transition to multiparty democracy.向多党民主制的转变。
1.1
- count noun Music a momentary modulation from one key to another【乐】临时转调。
1.2
- count noun Physics a change of an atom, nucleus, electron, etc. from one quantum state to another, with emission or absorption of radiation【物理】跃迁, 转变。
- chiefly N. Amer. undergo or cause to undergo a process or period of transition〈主北美〉（使）经历转变过程（或过渡期）; 过渡：
no obj. he transitioned into filmmaking easily.他很轻松地过渡到电影制片行业。
派生词
transitionary
adjective词源
mid 16th cent.: from French， or from Latin transitio（n-）， from transire 'go across'.