What is the meaning of whisker?

noun

• A very small distance or space.
  • usage: "they escaped by a hair's-breadth"; "they lost the election by a whisker"
  • synonyms: hair's-breadth, hairsbreadth, hair
• A long stiff hair growing from the snout or brow of most mammals as e. G. A cat.
  • synonyms: vibrissa, sensory hair

verb

• Furnish with whiskers.
  • usage: "a whiskered jersey"
  • synonyms: bewhisker