What is Affray?

Legal Definition
In many legal jurisdictions related to English common law, affray is a public order offence consisting of the fighting of one or more persons in a public place to the terror (in French: à l'effroi) of ordinary people. Depending on their actions, and the laws of the prevailing jurisdiction, those engaged in an affray may also render themselves liable to prosecution for assault, unlawful assembly, or riot; if so, it is for one of these offences that they are usually charged.
-- Wikipedia
Legal Definition
Criminal law. The fighting of two or more persons, in some public place, to the terror of the people.

2. To constitute this offence there must be, 1st, a fighting; 2d, the fighting must be between two or more persons; 3d, it must be in some public place ; 4th, it must be to the terror of the people.

3. It differs from a riot, it not being premeditated; for if any persons meet together upon any lawful or innocent occasion, and happen on a sudden to engage in fighting, they are not guilty of a riot but an affray only; and in that case none are guilty except those actually engaged in it. Hawk. b. 1, c. 65, s. 3 ; 4 Bl. Com. 146; 1 Russell, 271.
-- Bouviers Law Dictionary
Legal Definition
In criminal law. The fighting of two or more persons in some public place to the terror of the people. Burton v. Com., 60 S. W. 526, 22 Ky. Law Rep. 1315; Thompson v. State, 70 Ala. 26; State v. Allen, 11 N. a 356.

It differs from a riot in not being premeditated ; for if any persons meet together upon any lawful or innocent occasion, and happen on a sadden to engage in fighting, they are not guilty of a riot, but an affray only; and in that case none are guilty except those actually engaged in it. Hawk. P. C. bk. 1, c. 65. § 3; 4 Bl. Comm. 146; 1 Russ. Crimes, 271; Supreme Council v. Garrigus, 104 Ind. 133, 3 N. E. 818, 54 Am. Ren. 298.

If two or more persons voluntarily or by agreement engage in any fight, or use any blows or violence towards each other in an angry or quarrelsome manner, in any public place to the disturbance of others, they are piiltv of an affray, and shall be punished by imprisonment in the county jail not exceeding thirty days, or by fine not exceeding one hundred dollars. Rev. Code Iowa 1880. § 4065.
-- Black's Law Dictionary
Legal Definition
A public fight.
-- Ballentine's Law Dictionary