Definitions of reversible:

• noun:   a garment (especially a coat) that can be worn inside out (with either side of the cloth showing)
• adjective:   capable of reversing or being reversed

  Example: "Reversible hypertension"

• adjective:   capable of being reversed or used with either side out

  Example: "A reversible jacket"

• adjective:   capable of being reversed

  Example: "A reversible decision is one that can be appealed or vacated"

• adjective:   capable of assuming or producing either of two states

  Example: "A reversible chemical reaction"