Meaning of “block” - Learner’s Dictionary

block

verb [ T ] uk us /blɒk/
CANNOT PASS (also block up)

B2 to prevent anyone or anything from passing through a place:

A fallen tree blocked the road.
The sink is blocked up.
a blocked drain
STOP PROGRESS

to stop something from happening or making progress:

The government has blocked plans for a new wind farm.
CANNOT SEE

to be between someone and the thing they are looking at, so that they cannot see:

A pillar was blocking my view.

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