Definition of porters:
(n) :
A person who carries luggage and related objects.
(n) :
(countable, uncountable, beer) A strong, dark ale, originally favored by porters (etymology 1, sense 1), similar to a stout but less strong.
(n) :
(countable) A person in control of the entrance to a building.
(n) :
(computing) One who ports software (makes it usable on another platform).
(n) :
(entomology) An ant having the specialized role of carrying.
(n) :
(countable, bowling) An employee who clears and cleans tables and puts bowling balls away.