what is the definition jab
jab verb. âº [I or T, usually + adv/prep] to âpush or âhit something âforcefully and âquickly, often with a âthin or âsharp âobject: The âdoctor jabbed the âneedle into the dog's âleg. Watch out! You ânearly jabbed me in the âeye with âyour âumbrella! He was jabbing a âfinger at (= towards) them and âshouting âangrily.