1.Definition: appearing dead; not breathing or having no perceptible pulse
2.Definition: not breathing or able to breathe except with difficulty
"Breathless at thought of what I had done", "Breathless from running", "Followed the match with breathless interest"
Related Adjective(s):dyspneal, dyspneic, dyspnoeal, dyspnoeic
3.Definition: tending to cause suspension of regular breathing
"A breathless flight"