What is the meaning of snub?

noun

• An instance of driving away or warding off.
  • synonyms: rebuff, repulse
• A refusal to recognize someone you know.
  • usage: "the snub was clearly intentional"
  • synonyms: cut, cold shoulder

verb

• Refuse to acknowledge.
  • usage: "She cut him dead at the meeting"
  • synonyms: ignore, disregard, cut
• Reject outright and bluntly.
  • usage: "She snubbed his proposal"
  • synonyms: rebuff, repel

adjective

• Unusually short.
  • usage: "a snub nose"