Definitions

1. adjective

relating to or involving conditions of higher than normal atmospheric pressure

“The hyperbaric chamber is used to treat patients with decompression sickness.”

2. noun

a chamber or vessel in which the air pressure is higher than the surrounding atmospheric pressure, used to treat medical conditions such as decompression sickness, gas gangrene, or carbon monoxide poisoning, or to accelerate healing of wounds or damaged tissues

“The patient was placed in the hyperbaric oxygen therapy chamber for several hours.”

3. adverb

in a hyperbaric environment or under conditions of higher than normal atmospheric pressure

“The scuba divers had to surface carefully to avoid entering a hyperbaric state.”