Definition of decompresses:
(v) :
(transitive, computing) To restore (compressed data) to its original form.
(v) :
(transitive) To relieve the pressure or compression on something.
(v) :
(transitive) To bring someone (such as a diver) back to normal atmospheric pressure after being exposed to high pressure.
(v) :
(intransitive) To adjust to normal atmospheric pressure after being exposed to high pressure.
(v) :
(intransitive, informal) To relax.