Definitions of boot:

• noun:   footwear that covers the whole foot and lower leg
• noun:   British term for the luggage compartment in a car
• noun:   an instrument of torture that is used to crush the foot and leg
• noun:   protective casing for something that resembles a leg
• noun:   the act of delivering a blow with the foot
• noun:   the swift release of a store of affective force

  Example: "What a boot!"

• verb:   cause to load (an operating system) and start the initial processes

  Example: "Boot your computer"

• verb:   kick; give a boot to
• name:  A surname (very rare: popularity rank in the U.S.: #29283)