Also found in: Thesaurus, Encyclopedia, Wikipedia.
The process of erosion and deposition in which a nearly level surface is produced, as by streams, wind, or ocean currents.
[Latin plānum, flat surface; see plane1 + -ation.]
(Geological Science) the erosion of a land surface until it is basically flat
pla•na•tion(pleɪˈneɪ ʃən, plə-)
the erosional work done by streams that contributes to gradation of the land surface.
the formation of a flat or level surface by the process of erosion.See also: Earth