What is the meaning of jab?

noun

• A sharp hand gesture (resembling a blow. )
  • usage: "he warned me with a jab with his finger"; "he made a thrusting motion with his fist"
  • synonyms: jabbing, poke, poking, thrust, thrusting
• A quick short straight punch.
• The act of touching someone suddenly with your finger or elbow.
  • usage: "she gave me a sharp dig in the ribs"
  • synonyms: dig

verb

• Poke or thrust abruptly.
  • usage: "he jabbed his finger into her ribs"
  • synonyms: prod, stab, poke, dig
• Strike or punch with quick and short blows.
• Stab or pierce.
  • usage: "he jabbed the piece of meat with his pocket knife"
  • synonyms: stab