float on

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float (up)on (something)

To bob, drift, or glide over or on a particular surface. Look at all the ducks just floating on the water! The paper airplane floated upon the air for a few seconds before sinking to the ground.
See also: float

float (up)on something

to drift as if on the surface of something; to drift along through the air. (Upon is formal and less commonly used than on.) The little tufts of dandelion seeds floated upon the breeze. The fluff floated on the breeze.
See also: float, on