tran·si·tion tranˈziSH(ə)n, tranˈsiSH(ə)n
noun
1. the process or a period of changing from one state or condition to another.
"students in transition from one program to another"
verb
2. undergo or cause to undergo a process or period of transition.
"the network ought to be built by the federal government and then transitioned into private industry"
synonyms:
change, passage, move, transformation, conversion, metamorphosis, alteration, handover, changeover; segue, shift, switch, jump, leap, progression; progress, development, evolution, flux
(Definition compliments of Google)