[ adjective ] streaming or flapping or spreading wide as if in a current of air
"ran quickly, her flaring coat behind her" "a fluttering scarf" "flying banners" "flags waving in the breeze"
Used in print(Octavia Waldo, A Cup of the Sun....)
Its form was a heavy figure in a fluttering soutane .
[ adjective ] moving rapidly and lightly to and fro as of or with wings
"fluttering birds" "the flittering wings of a fledgling"
Used in print(Christopher Davis, First Family....)
His hands , which had been as quick as a pair of fluttering birds , were now neither active nor really relaxed .