A changeover is when one person or thing takes over from another. It's like swapping places.
In everyday life, people often talk about changeovers in situations where things are being switched from one person to another, or from one type of thing to another. For example, a news anchor might do a changeover with the weather reporter at the end of the show. This means that the news anchor steps away and the weather reporter starts talking. In businesses, there's also often talk of changeovers in production lines, where machines are switched to start producing a new product instead of an old one. In other cases, people might be talking about changing shifts or roles at work, which is another kind of changeover.
A conversion or transition from one thing to another
