What is the meaning of stab?

noun

• A sudden sharp feeling.
  • usage: "pangs of regret"; "she felt a stab of excitement"; "twinges of conscience"
  • synonyms: pang, twinge
• A strong blow with a knife or other sharp pointed instrument.
  • usage: "one strong stab to the heart killed him"
  • synonyms: thrust, knife thrust
• Informal words for any attempt or effort.
  • usage: "he gave it his best shot"; "he took a stab at forecasting"
  • synonyms: shot

verb

• Use a knife on.
  • usage: "The victim was knifed to death"
  • synonyms: knife
• Stab or pierce.
  • usage: "he jabbed the piece of meat with his pocket knife"
  • synonyms: jab
• Poke or thrust abruptly.
  • usage: "he jabbed his finger into her ribs"
  • synonyms: jab, prod, poke, dig