Definitions for "Context switch"
switching of processor from executing one thread or process to executing another
A context switch is the action of switching a CPU between executing one thread and another, transferring from one to the other. This may involve crossing one or more protection boundary.
the transition between contexts that takes place when switching between threads
a change in activity type, typically manifested by the need to look at a different window, to approve or cancel an action, or to consider a different solution