Meaning of “switch” - Learner’s Dictionary

switch

verb [ I, T ] uk us /swɪtʃ/
CHANGE

B2 to change from one thing to another:

We're trying to encourage people to switch from cars to bicycles.
He's just switched jobs.
EXCHANGE

to exchange something with someone else:

After a couple of months we switched roles.

(Definition of “switch verb” from the Cambridge Learner’s Dictionary © Cambridge University Press)