Definition of stable adjective from the Oxford Advanced Learner's Dictionary

        

    stable

     adjective
    adjective
    BrE BrE//ˈsteɪbl//
     
    ; NAmE NAmE//ˈsteɪbl//
     
    Economy
     
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  1. 1  firmly fixed; not likely to move, change or fail synonym steady stable prices a stable relationship This ladder doesn't seem very stable. The patient's condition is stable (= it is not getting worse). The situation in the country has remained relatively stable for a few months now. See related entries: Economy
  2. 2  (of a person) calm and reasonable; not easily upset synonym balanced Mentally, she is not very stable.
  3. 3 (specialist) (of a substance) staying in the same chemical or atomic state chemically stable an element forming stable compounds
  4. opposite unstable
    Word Familystable adjective (unstable)stability noun (instability)stabilize verb Word Originadjective Middle English: from Anglo-Norman French, from Latin stabilis, from the base of stare ‘to stand’.Extra examples Don’t worry—it’s perfectly stable! He was not emotionally stable enough to think through his decision. Put a book under the table leg to keep it stable. The unit is stable enough on level ground. attempts to keep prices stable He was not married, but he was in a stable relationship. The industry should do everything it can to keep prices stable. The patient’s condition is stable. These children badly need a stable and secure home life. This ladder doesn’t seem very stable. a stable mind/​relationship/​family/​home a stable situation/​environment/​government/​population stable employment
See the Oxford Advanced American Dictionary entry: stable