capable of floating; that can be floated.
that can be floated on, as a river.

1820–30; float + -able

floatability, noun
unfloatable, adjective
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Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
float (fləʊt)
1.  to rest or cause to rest on the surface of a fluid or in a fluid or space without sinking; be buoyant or cause to exhibit buoyancy: oil floats on water; to float a ship
2.  to move or cause to move buoyantly, lightly, or freely across a surface or through air, water, etc; drift: fog floated across the road
3.  to move about aimlessly, esp in the mind: thoughts floated before him
4.  to suspend or be suspended without falling; hang: lights floated above them
5.  (tr)
 a.  to launch or establish (a commercial enterprise, etc)
 b.  to offer for sale (stock or bond issues, etc) on the stock market
6.  (tr) finance to allow (a currency) to fluctuate against other currencies in accordance with market forces
7.  (tr) to flood, inundate, or irrigate (land), either artificially or naturally
8.  (tr) to spread, smooth, or level (a surface of plaster, rendering, etc)
9.  something that floats
10.  angling an indicator attached to a baited line that sits on the water and moves when a fish bites
11.  a small hand tool with a rectangular blade used for floating plaster, etc
12.  chiefly (US) any buoyant object, such as a platform or inflated tube, used offshore by swimmers or, when moored alongside a pier, as a dock by vessels
13.  Also called: paddle a blade of a paddle wheel
14.  (Brit) a buoyant garment or device to aid a person in staying afloat
15.  a hollow watertight structure fitted to the underside of an aircraft to allow it to land on water
16.  another name for air bladder
17.  an exhibit carried in a parade, esp a religious parade
18.  a motor vehicle used to carry a tableau or exhibit in a parade, esp a civic parade
19.  a small delivery vehicle, esp one powered by batteries: a milk float
20.  (Austral), (NZ) a vehicle for transporting horses
21.  chiefly (US) banking the total value of uncollected cheques and other commercial papers
22.  chiefly (US), (Canadian) a sum to be applied to minor expenses; petty cash
23.  a sum of money used by shopkeepers to provide change at the start of the day's business, this sum being subtracted from the total at the end of the day when calculating the day's takings
24.  the hollow floating ball of a ballcock
25.  engineering a hollow cylindrical structure in a carburettor that actuates the fuel valve
26.  chiefly (US), (Canadian) a carbonated soft drink with a scoop of ice cream in it
27.  (in textiles) a single thread brought to or above the surface of a woven fabric, esp to form a pattern
28.  forestry a measure of timber equal to eighteen loads
[Old English flotian; related to Old Norse flota , Old Saxon flotōn; see fleet²]

Collins English Dictionary - Complete & Unabridged 10th Edition
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