Changeover/ˈtʃeɪndʒəʊvər/ Definition 1 of 4Pro Tip 1/3New Phase Use 'changeover' when discussing the start of a different phase in life or processes. The changeover to adulthood is significant. Pro Tip 2/3Adaptation Required 'Changeover' implies a need to adapt to new methods or environments. Employees are training for the changeover to the new software system. Pro Tip 3/3Timeframe Involved A 'changeover' can indicate the time taken to switch from one state to another. The changeover period for the new policy extends over three months.