(n)an increased depth and rate of breathing greater than demanded by the body needs; can cause dizziness and tingling of the fingers and toes and chest pain if continued
The Collaborative International Dictionary of English (GCIDE) v.0.53Collaborative International Dictionary (GCIDE)
n. 1. The act or process of hyperventilating; breathing rapidly and deeply. [ PJC ]
2. (Med.) A condition in which alveolar carbon dioxide concentration is markedly lower than normal, usually due to breathing rapidly and deeply. [ PJC ]