Definition of stable:
(n) :
a building, wing or dependency set apart and adapted for lodging and feeding (and training) animals with hoofs, especially horses; (metonymy) all the racehorses of a particular stable, i.e. belonging to a given owner
(v) :
put or keep (horse) in stable
(adj) :
relatively unchanging, permanent; firmly fixed or established, not easily to be moved, changed, unbalanced, destroyed or altered in value