Definition of Jab

Verb: jab (jabbed,jabbing) jab

Push suddenly or strongly with a finger or something pointed
"he jabbed his finger into her ribs";
- prod, stab, poke, dig
Strike or punch with quick and short blows
Stab or pierce
"he jabbed the piece of meat with his pocket knife";
- stab

Noun: jab jab

A sharp hand gesture (resembling a blow)
"he warned me with a jab with his finger";
- jabbing, poke, poking, thrust, thrusting
A quick short straight punch
The act of touching someone suddenly with your finger or elbow
"she gave me a sharp jab in the ribs";
- dig
[Brit] The act of putting a liquid into the body by means of a syringe
"the nurse gave him a flu jab";
- injection, shot
[Brit] Taking a vaccine as a precaution against contracting a disease
- inoculation, vaccination