Definitions of limber:

• noun:   a two-wheeled horse-drawn vehicle used to pull a field gun or caisson
• verb:   cause to become limber

  Example: "The violist limbered her wrists before the concert"

• verb:   attach the limber

  Example: "Limber a cannon"

• adjective:   (used of persons' bodies) capable of moving or bending freely
• adjective:   (used of e.g. personality traits) readily adaptable

  Example: "A limber imagination"

• name:  A surname (very rare: popularity rank in the U.S.: #50755)