Meaning of “grasp” - Learner’s Dictionary

grasp

noun [ no plural ] uk us /ɡrɑːsp/
UNDERSTAND

an understanding of something:

He has an excellentgrasp of English.
HOLD

your hold on someone or something:

I tried to pull him out but he slipped from my grasp.
ABILITY

the ability to obtain or achieve something:

Victory is within our grasp.

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