What is the meaning of sole?

noun

• The underside of footwear or a golf club.
• Lean flesh of any of several flatfish.
  • synonyms: fillet of sole
• The underside of the foot.
• Right-eyed flatfish; many are valued as food; most common in warm seas especially European.

verb

• Put a new sole on.
  • usage: "sole the shoes"
  • synonyms: resole

adjective

• Not divided or shared with others.
  • usage: "they have exclusive use of the machine"; "sole rights of publication"
  • synonyms: exclusive
• Being the only one; single and isolated from others.
  • usage: "the lone doctor in the entire county"; "a lonesome pine"; "an only child"; "the sole heir"; "the sole example"; "a solitary instance of cowardice"; "a solitary speck in the sky"
  • synonyms: lone, lonesome, only, solitary