What is the meaning of ignore?

verb

• Refuse to acknowledge.
  • usage: "She cut him dead at the meeting"
  • synonyms: disregard, snub, cut
• Bar from attention or consideration.
  • usage: "She dismissed his advances"
  • synonyms: dismiss, disregard, brush aside, brush off, discount, push aside
• Fail to notice.
• Give little or no attention to.
  • usage: "Disregard the errors"
  • synonyms: neglect, disregard
• Be ignorant of or in the dark about. .