1. To open the mouth wide in catching the breath, or in laborious respiration; to labor for breath; to breathe convulsively; to pant violently.
2. To pant with eagerness; to show vehement desire.

1. To breathe noisily, as when one is exhausted; SYN. puff, gasp, heave.
2. To utter while panting, as if out of breath.

To breathe with difficulty.