1breathe or cause to breathe at an abnormally rapid rate, so increasing the rate of loss of carbon dioxide: [no object]:she started to hyperventilate under stress [with object]:the patients were hyperventilated for two minutes
2 [no object] be or become overexcited:the President was hyperventilating about a minor newspaper story
Derivatives
hyperventilation
noun
hyperventilate in other Oxford dictionaries
Definition of hyperventilate in the US English dictionary
