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"
tending to cause suspension of regular breathing
"a breathless flight"
"breathtaking adventure"
appearing dead; not breathing or having no perceptible pulse
"an inanimate body"
"pulseless and dead"
Having difficulty breathing; gasping.