| Noun | 1. | decompression - restoring compressed information to its normal form for use or display decipherment, decoding, decryption - the activity of making clear or converting from code into plain text; "a secret key or password is required for decryption" compression - encoding information while reducing the bandwidth or bits required |
| 2. | decompression - relieving pressure (especially bringing a compressed person gradually back to atmospheric pressure) alleviation, easement, easing, relief - the act of reducing something unpleasant (as pain or annoyance); "he asked the nurse for relief from the constant pain" compressing, compression - applying pressure |