(adj) not breathing or able to breathe except with difficulty, Syn. dyspneal, dyspneic, dyspnoeal, dyspnoeic, Ant. breathing, Example:breathless at thought of what I had done; breathless from running; followed the match with breathless interest
a. 1. Spent with labor or violent action; out of breath. [ 1913 Webster ]
2. Not breathing; holding the breath, on account of fear, expectation, or intense interest; attended with a holding of the breath; as, breathless attention. [ 1913 Webster ]
But breathless, as we grow when feeling most. Byron. [ 1913 Webster ]