1. to reduce the pressure of compressed gas or air
Usage: technical
2. to expand compressed computer data back to its original form
Usage: computing
3. to relax and release tension or stress
Usage: informal

Examples

• The diver slowly decompresses after ascending from deep water.
• The software automatically decompresses the downloaded files.
• She decompresses by reading a book after work.
• The airplane cabin decompresses if there’s a breach in the hull.
• He decompresses the archive to access the individual documents.
• After the stressful meeting, she decompresses with some music.