1able to be turned the other way round:a reversible pushchair seat
(of a garment or fabric) faced on both sides so as to be worn or used with either outside:a reversible jacketa reversible duvet cover
2(of the effects of a process or condition) capable of being reversed so that the previous state is restored:potentially reversible forms of renal failure
Chemistry (of a reaction) occurring together with its converse, and so yielding an equilibrium mixture of reactants and products:the formation of ethyl acetate from ethyl alcohol and acetic acid is a reversible reaction
Physics (of a change or process) capable of complete and detailed reversal, especially denoting or undergoing an ideal change in which a system is in thermodynamic equilibrium at all times:the entropy change is zero only in the limiting case of a reversible process
Chemistry (of a colloid) capable of being changed from a gel into a sol by a reversal of the treatment which turns the sol into a gel:a reversible sol-gel transformation
Remember that the ending of reversible is spelled -ible.