changeover

noun

1. a conversion or complete change from one thing, condition, or system to another, as in equipment, personnel, methods of production, etc.: a changeover to automated equipment.

noun

1. an alteration or complete reversal from one method, system, or product to anothera changeover to decimal currency
2. a reversal of a situation, attitude, etc
3. sport
   1. the act of transferring to or being relieved by a team-mate in a relay race, as by handing over a baton, etc
   2. Also called: change, takeoverthe point in a relay race at which the transfer is made
4. sport, mainly British the exchange of ends by two teams, esp at half time

verb change over (adverb)

5. to adopt (a completely different position or attitude)the driver and navigator changed over after four hours
6. (intr) sport, mainly British (of two teams) to exchange ends of a playing field, etc, as after half time