Meaning of “grab” - Learner’s Dictionary

grab

verb [ T ] us uk /ɡræb/ present participle grabbing, past tense and past participle grabbed
TAKE SUDDENLY

B1 to take hold of something or someone suddenly:

He grabbed my arm and pulled me away.

More examples

  • He reached out and grabbed her arm.
  • Somebody grabbed me from behind.
  • She grabbed hold of the rail to steady herself.
  • She grabbed me by the arm.
  • I grabbed a few things and dashed out of the house.
DO QUICKLY informal

to eat, do, or get something quickly because you do not have much time:

I grabbed a sandwich on the way to the station.
grab sb's attention informal

to attract someone's attention:

The advertisement is designed to grab people's attention.
TAKE OPPORTUNITY

B2 If someone grabs a chance or opportunity, they take it quickly and with enthusiasm.

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