Definitions of whisker:

• noun:   a long stiff hair growing from the snout or brow of most mammals as e.g. a cat
• noun:   a very small distance or space

  Example: "They lost the election by a whisker"

• verb:   furnish with whiskers

  Example: "A whiskered jersey"

• name:  A surname (very rare: popularity rank in the U.S.: #76196)