To reschedule means to change the time or date when something is planned to happen. When a teacher reschedules a test from Friday to Monday, the test still happens but on a different day. When a dentist appointment gets rescheduled, you're moving it to a new slot on the calendar.

People reschedule for all sorts of reasons. Maybe there's a conflict: your soccer game got rescheduled to the same time as your piano recital, so you need to reschedule one of them. Maybe something unexpected comes up: a snowstorm forces the school to reschedule the field trip. Sometimes people simply realize the original timing won't work and need to pick a better time.

Rescheduling is different from canceling: when you cancel something, it's not happening at all, but when you reschedule it, you're committing to a new time. If your friend keeps rescheduling your plans to hang out instead of choosing a day and sticking to it, you might start to wonder if they actually want to spend time together.