1. 
1. 
2. 
[syn: reversible, two-sided]
3.  capable of being reversed; 
- Example: "a reversible decision is one that can be appealed or vacated"
4.  capable of assuming or producing either of two states; 
- Example: "a reversible chemical reaction"
- Example: "a reversible cell"
The Collaborative International Dictionary of English v.0.48:
Reversible \Re*vers"i*ble\, a. [Cf. F. r['e]versible revertible,
   reversionary.]
   1. Capable of being reversed; as, a chair or seat having a
      reversible back; a reversible judgment or sentence.
      [1913 Webster]
   2. Hence, having a pattern or finished surface on both sides,
      so that either may be used; -- said of fabrics.
      [1913 Webster]
   Reversible lock, a lock that may be applied to a door
      opening in either direction, or hinged to either jamb.
   Reversible process. See under Process.
      [1913 Webster]
WordNet (r) 3.0 (2006):
reversible
    adj 1: capable of reversing or being reversed; "reversible
           hypertension" [ant: irreversible]
    2: capable of being reversed or used with either side out; "a
       reversible jacket" [syn: reversible, two-sided] [ant:
       nonreversible, one-sided]
    3: capable of being reversed; "a reversible decision is one that
       can be appealed or vacated"
    4: capable of assuming or producing either of two states; "a
       reversible chemical reaction"; "a reversible cell"
    n 1: a garment (especially a coat) that can be worn inside out
         (with either side of the cloth showing)
Moby Thesaurus II by Grady Ward, 1.0:
35 Moby Thesaurus words for "reversible":
   ameliorable, amendable, atavistic, correctable, corrigible,
   curable, emendable, fixable, improvable, medicable, mendable,
   reactionary, recessive, recidivist, recidivous, reclaimable,
   recoverable, rectifiable, recyclable, redeemable, regressive,
   remediable, repairable, reparable, restorable, retrievable,
   retrograde, retrogressive, retrorse, retroverse, returnable,
   reversional, reversionary, revertible, revulsionary