decompression sickness [the problems that people experience when they come up to the surface after swimming very deep in the sea]
2 the act of reducing the pressure of the airवायु दाब को घटाने की प्रक्रिया
3 (technical)the process of allowing something that has been made smaller to fill the space that it originally neededसंकर्षित या संकोचित वस्तु को पुनः अपने मूल आकार में लौटने की प्रक्रिया