Aid, n. [F. aide, OF. aïde, aïe, fr. the verb. See Aid, v. t.] 1. Help; succor; assistance; relief.
An unconstitutional mode of obtaining aid.
Hallam.
2. The person or thing that promotes or helps in something done; a helper; an assistant.
It is not good that man should be alone; let us make unto him an aid like unto himself.
Tobit viii. 6.
3. (Eng. Hist.) A subsidy granted to the king by Parliament; also, an exchequer loan.
4. (Feudal Law) A pecuniary tribute paid by a vassal to his lord on special occasions. Blackstone.
5. An aid-de-camp, so called by abbreviation; as, a general's aid.
Aid prayer(Law), a proceeding by which a defendant beseeches and claims assistance from some one who has a further or more permanent interest in the matter in suit. — To pray in aid, to beseech and claim such assistance.