Meaning of “boot” - Learner’s Dictionary

boot

noun [ C ] us uk /buːt/
SHOE

A2 a strong shoe that covers your foot and part of your leg:

a pair of boots
CAR UK US trunk

B1 a closed space at the back of a car for storing things in

get/be given the boot informal

to be told that you must leave your job

(Definition of “boot noun” from the Cambridge Learner’s Dictionary © Cambridge University Press)