Longman Dictionary of Contemporary English homepage

reversible

 adjective
     
re‧vers‧i‧ble
1 a change that is reversible can be changed back to how it was before [≠ irreversible]:
A lot of chemical reactions are reversible.
2 a piece of clothing or material that is reversible can be worn with either side showing on the outside:
a reversible jacket
Definition from the Longman Dictionary of Contemporary English
Advanced Learner's Dictionary.

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