Definitions:
rest or move on or near the surface of a liquid without sinking

move or hover slowly and lightly in a liquid or the air; drift

put forward (an idea) as a suggestion or test of reactions.

(of a currency) fluctuate freely in value in accordance with supply and demand in the financial markets

a thing that is buoyant in water.

a small vehicle or cart, especially one powered by electricity.

a sum of money used for change at the beginning of a period of trading in a shop or stall etc., or for minor expenditures.

a hand tool with a rectangular blade used for smoothing plaster.

a soft drink with a scoop of ice cream floating in it

(in critical path analysis) the period of time by which the duration of an activity may be extended without affecting the overall time for the process.