Chapter Flingdust to Float of F by Webster's Dictionary (1913 Edition)

2. To flood; to overflow; to cover with water.

Proud Pactolus floats the fruitful lands.

Dryden.

3. (Plastering) To pass over and level the surface of with a float while the plastering is kept wet.

4. To support and sustain the credit of, as a commercial scheme or a joint-stock company, so as to enable it to go into, or continue in, operation.