What is the meaning of pass off?

verb

• Be accepted as something or somebody in a false character or identity.
  • usage: "She passed off as a Russian agent"
• Disregard.
  • usage: "She passed off the insult"
• Cause to be circulated and accepted in a false character or identity.
  • usage: "She passed the glass off as diamonds"; "He passed himself off as a secret agent"
• Disappear gradually.
  • usage: "The pain eventually passed off"
  • synonyms: evanesce, fade, blow over, fleet, pass
• Come to pass.
  • usage: "What is happening"; "The meeting took place off without an incidence"; "Nothing occurred that seemed important"
  • synonyms: happen, hap, go on, occur, pass, fall out, come about, take place
• Expel (gases or odors. ).
  • synonyms: emit, breathe