To help; assist; afford support or relief; promote the desire, purpose, or action of: as, to aid a person in his business, or an animal in its efforts; to aid a medicine in its operation.To promote the course or accomplishment of; help in advancing or bringing about; forward; facilitate: as, to aid the recovery of a patient, or the operation of a machine; to aid one's designs.n. Help; succor; support; assistance.n. He who or that which aids or yields assistance; a helper; an auxiliary; an assistant: as, Coleridge's “Aids to Reflection.”n. In feudal law, a customary payment made by a tenant or vassal to his lord, originally a voluntary gift; hence, in English history, applied to the forms of taxation employed by the crown between the Norman conquest and the fourteenth century.n. An aide-de-camp: so called by abbreviation.n. plural In the manège, the helps by which a horseman contributes toward the motion or action required of a horse, as by a judicious use of the heel, leg, rein, or spur.n. A deep gutter cut across plowed land.n. A reach in a river.n. In the navy, an officer on the staff of an admiral whose duties are similar to those of an aide-de-camp to a general.