swoon /swuːn/ BrE AmE verb [intransitive]
[ Date: 1300-1400 ; Origin: swown 'to swoon' (13-19 centuries) , from Old English geswogen 'made sick or unconscious' ]
1 . to be extremely excited and unable to control yourself because you admire someone so much
swoon over
crowds of teenage girls swooning over pop stars
2 . old-fashioned to fall to the ground because you have been affected by an emotion or shock SYN faint
—swoon noun [singular]