0 to breathe too quickly and so cause too much oxygen to enter the blood:
1 to breathe too quickly, causing too much oxygen to enter the blood
He imagines conspiracies and starts hyperventilating.
I was with Jacob once when a fan was hyperventilating so much I thought she would faint.
We see a young woman practically hyperventilating with excitement.
We all hyperventilate at times of stress.
When someone begins to feel anxious, breathing rhythms change from slow constant breaths to quick, short breaths (also known as hyperventilating).
It can be caused by taking several very deep breaths, or hyperventilating, just before a dive.
They reported she was very agitated, crying, hyperventilating.
The child is extremely nervous and starts hyperventilating.
