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.)

Defn: A subsidy granted to the king by Parliament; also, an exchequer loan.

4. (Feudal Law)

Defn: 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.

AIDANCE
Aid"ance, n. Etym: [Cf. OF. aidance.]

Defn: Aid. [R.]
Aidance 'gainst the enemy. Shak.

AIDANT
Aid"ant, a. Etym: [Cf. F. aidant, p. pr. of aider to help.]

Defn: Helping; helpful; supplying aid. Shak.