sta|ble1 W3 [ˈsteıbəl] adj
[Date: 1200-1300; : Old French; Origin: estable, from Latin stabilis, from stare 'to stand']
1.) steady and not likely to move or change
≠ ↑unstable
A wide base will make the structure much more stable.
in a stable condition
BrE /in stable condition AmE
He is said to be in a stable condition in hospital.
Children like a stable environment.
2.) calm, reasonable, and not easy to upset
≠ ↑unstable
He was clearly not a very stable person.
3.) technical a stable substance tends to stay in the same chemical or ↑atomic state
≠ ↑unstable
>stably adv
stable 2
stable2 n
[Date: 1200-1300; : Old French; Origin: estable, from Latin stabulum, from stare; STABLE1]
1.) a building where horses are kept
2.) stables [plural]
a place where horses are kept and that often gives riding lessons
3.) a group of racing horses that has one owner or trainer
4.) a group of people working for the same company or with the same trainer
actors from the same Hollywood stable
5.) shut/close the stable door after the horse has bolted
BrE to try to prevent something when it is too late and harm has already been done
stable 3
stable3 v [T]
to put or keep a horse in a stable

Dictionary of contemporary English. 2013.