1 : a building in which horses are kept, fed, and cared for
She rode the horse back to the stable.
a horse stable
— sometimes used in the plural form stables especially to mean a place where horses are kept for riding lessons
She rode the horse back to the stables.
2 a : the group of racehorses that belong to the same owner
There have been three winners from his stable this season.
b : a group of people (such as athletes, writers, or performers) who work for or are trained by the same person, organization, or business
a stable of actors/writers
c : a group of products that are made by the same company
A new model will be added to the car company's stable of sedans.