Definition of tractors:
(n) :
(agriculture) A vehicle used in farms e.g. for pulling farm equipment and preparing the fields.
(n) :
(US) A truck (or lorry) for pulling a semi-trailer or trailer.
(n) :
Any piece of machinery that pulls something.
(n) :
(agriculture) A movable coop without a floor to allow for free ranging.
(n) :
(aviation) An aeroplane where the propeller is located in front of the fuselage.
(n) :
(UK, rail transport) A British Rail Class 37 locomotive.