- 1a reduction in air pressure; the act of reducing the pressure of the air a decompression chamber (= a piece of equipment that divers sit in so that they can return slowly to normal air pressure after being deep in the ocean) decompression sickness (= severe pain and difficulty in breathing experienced by divers who come back to the surface of deep water too quickly) see bend
- 2(technology) the act or process of allowing something that has been compressed (= made smaller) to fill the space that it originally took up The computers have built-in video decompression capabilities.
Check pronunciation: decompression