(uncountable) Help; assistance; succor, relief.

(countable) A helper; an assistant.

(countable) Something which helps; a material source of help.

(countable, Britain) An historical subsidy granted to the crown by Parliament for an extraordinary purpose, such as a war effort.

(countable, Britain) An exchequer loan.

(countable, law) A pecuniary tribute paid by a vassal to his feudal lord on special occasions.

(countable) Alternative form of aide (“an aide-de-camp”)

(countable, chiefly in the plural, horse racing) The rider's use of hands, legs, voice, etc. to control the horse.

(transitive) To provide support to; to further the progress of; to help; to assist.

(climbing) To climb with the use of aids such as pitons.