Meaning of “clamp” - Learner’s Dictionary

clamp

verb uk us /klæmp/
clamp sth around/over/to, etc

to put something in a particular position and hold it there tightly:

He clamped his hand over her mouth.
clamp sth onto/to/together, etc

to fasten two things together using a clamp

[ T ] UK to fasten a metal cover on the wheel of a car to stop it moving because it has been parked in an illegal place

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