boot 1 
(bt)
(bt)n.
1. A durable covering for the foot and part or much of the leg, usually made of leather, fabric, plastic, or rubber.
2. A protective covering, especially a sheath to enclose the base of a floor-mounted gear shift lever in a car or truck.
3. Chiefly British An automobile trunk.
4.
a. A kick.
b. Slang An unceremonious dismissal, as from a job. Used with the.
c. Slang A swift, pleasurable feeling; a thrill.
5. A Denver boot.
6. A marine or navy recruit in basic training.
7. Computers The process of starting or restarting a computer.
8. boots An instrument of torture, used to crush the foot and leg.
tr.v. boot·ed, boot·ing, boots
1. To put boots on.
2. To kick: booted the ball into the goal.
3. Slang To discharge unceremoniously. See Synonyms at dismiss.
4. Computers To start (a computer) by loading an operating system from a disk.
5. To disable (a vehicle) by attaching a Denver boot.
6. Baseball To misplay (a ground ball).
[Middle English bote, from Old French.]