What is the meaning of slur?

noun

• Music) a curved line spanning notes that are to be played legato. (
• A disparaging remark.
  • usage: "in the 19th century any reference to female sexuality was considered a vile aspersion"; "it is difficult for a woman to understand a man's sensitivity to any slur on his virility"
  • synonyms: aspersion
• A blemish made by dirt.
  • usage: "he had a smudge on his cheek"
  • synonyms: smudge, spot, blot, daub, smear, smirch

verb

• Play smoothly or legato.
  • usage: "the pianist slurred the most beautiful passage in the sonata"
• Speak disparagingly of; e. G., make a racial slur.
  • usage: "your comments are slurring your co-workers"
• Utter indistinctly.
• Become vague or indistinct.
  • usage: "The distinction between the two theories blurred"
  • synonyms: blur, dim