Definitions

1. verb

to lift or cause something to rise to the surface

“The buoyant object will upfloat in the water after being submerged.”

2. noun

an object that rises to the surface, typically due to buoyancy

“The upfloat in the lake was a result of the recent rainfall.”

3. verb

to send or cause something to rise to the surface

“The diver upfloated the rope to the surface.”