AiringNot running at best speed in a race.
All Age RaceA race for two-year-olds and up.
All OutWhen a horse extends itself to the utmost.
Allowance RaceA race for which the racing secretary drafts certain conditions to determine weights to be carried based on the horse's age, sex and/or past performance.
AllowancesReductions in weights to be carried, allowed because of the conditions of the race or because an apprentice jockey is on a horse. Also, a weight reduction female horses are entitled to when racing against males, or that three-year-olds receive against older horses.
Also EligibleA horse officially entered for a race, but not permitted to start unless the field is reduced by scratches below a specified number.
Apprentice AllowanceWeight concession given to an apprentice rider usually 10 pounds until the fifth winner, seven pounds until the 35th winner and five pounds for one calendar year from the 35th winner. More rarely, a three-pound allowance is allowed to a rider under contract to a specific stable/owner for two years from his/her first win. This rule varies from state to state. Apprentices do not receive an allowance when riding in a stakes race. All jockeys going from track to track must have a receipt from the clerk of scales from their track verifying the jockeys' most recent total number of wins. Also known as a "bug," from the asterisk used to denote the weight allowance.
Appretice Rider who has not ridden a certain number of winners within a specified period of time. Also known as a "bug," from the asterisk used to denote the weight allowance such riders receive.
ApronThe (usually) paved area between the grandstand and the racing surface.
Auxiliary Starting GateA second starting gate used when the amount of horses in a race exceeds the capacity of the main starting gate.