ImpostWeight carried or assigned.
In HandRunning under moderate control, at less than top speed.
In The MoneyA horse that finishes first, second or third.
Infield Area encompassed by the inner rail of the racetrack.
InquiryReviewing the race to check into a possible infraction of the rules. Also, a sign flashed by officials on the tote board on such occasions. If lodged by a jockey, it is called an objection.
Isolation BarnA facility used to separate sick horses from healthy ones.