Definition of last:

part of speech: verb

To perform the duty for which a thing is made; to continue; to remain unimpaired; to hold out; to endure.

part of speech: noun

A burden; a certain weight or measure of variable amount.

part of speech: adjective

That comes after all the others in time, place, or order; utmost; final; next before the present.

part of speech: noun

The form or model of the foot, usually of wood, on which boots and shoes are made.