What is the meaning of climber?

noun

• A vine or climbing plant that readily grows up a support or over other plants.
• Someone seeking social prominence by obsequious behavior.
  • synonyms: social climber
• Someone who ascends on foot.
  • usage: "a solitary mounter of the staircase"
  • synonyms: mounter
• Someone who climbs as a sport; especially someone who climbs mountains.
  • usage: "the lead climber looked strong still but his partner often slumped in his ropes"
• An iron spike attached to the shoe to prevent slipping on ice when walking or climbing.
  • synonyms: crampon, crampoon, climbing iron