Anything light, soft or fuzzy, especially fur, hair, feathers. / Anything inconsequential or superficial. / (informal) A lapse or mistake, especially a mistake in an actor's lines.

(transitive) To make something fluffy. / (intransitive) To become fluffy, puff up. / (intransitive) To move lightly like fluff.

A light, brief snowfall. / A sudden and brief blast or gust; a light, temporary breeze. / A shower of dust, leaves etc. brought on by a sudden gust of wind. / (figuratively) Any sudden activity; a stir.

(transitive) To agitate, bewilder, fluster. / (intransitive) To move or fall in a flurry.

(now rare) A device used to measure the fluorescence of a solution. / (medicine) A device used to view continuous live X-ray images on a fluorescent screen.

(transitive) To examine with a fluoroscope.

(intransitive) To vary irregularly; to swing. / (intransitive) To undulate. / (intransitive) To be irresolute; to waver. / (transitive) To cause to vary irregularly.

(intransitive) To flap or wave quickly but irregularly. / (intransitive) Of a winged animal: to flap the wings without flying; to fly with a light flapping of the wings.

The act of fluttering; quick and irregular motion. / A state of agitation. / An abnormal rapid pulsation of the heart.

a ferrofluid that solidifies in the presence of a magnetic field