Decompression has several meanings:* in physics: the release of pressure and's the opposition of physical compression in medicine and aviation: decompression sickness in non-surgical back pain treatment: herniated disc decompression (a form of treatment for the back, employed by chiropractors) in surgery: a procedure used to treat spinal stenosis, carotid artery stenosis or any condition where a structure's being compressed in scuba diving: a decompression stop a decompression chamber a d… (More on Decompression)