Float  —v. 1 a (cause to) rest or move on the surface of a liquid. B set (a stranded ship) afloat. 2 colloq. A move in a leisurely way. B (often foll. By before) hover before the eye or mind. 3 (often foll. By in) move or be suspended freely in a liquid or gas. 4 a start or launch (a company, scheme, etc.). B offer (stock, shares, etc.) On the stock market. 5 commerce cause or allow to have a fluctuating exchange rate. 6 circulate or cause (a rumour or idea) to circulate. —n. 1 thing that floats, esp.: a a raft. B a light object as an indicator of a fish biting or supporting a fishing-net. C a hollow structure enabling an aircraft to float on water. D a floating device on water, petrol, etc., controlling the level. 2 small esp. Electrically-powered vehicle or cart (milk float). 3 decorated platform or tableau on a lorry in a procession etc. 4 a supply of loose change in a shop, at a fête, etc. B petty cash. 5 theatr. (in sing. Or pl.) Footlights. 6 tool for smoothing plaster.  floatable adj. [old english]