n. The formation of a flat surface by erosion and deposition.
n. The morphological transformation of a three-dimensional structure into a two-dimensional one through development or evolution.
The Century Dictionary and Cyclopedia
n. The act of planing or making plane or flat; specifically, in geology, the erosive process by which a stream or a glacier produces a nearly level surface; also the result of erosive processes.
WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
n. the process of erosion whereby a level surface is produced
Word Usage
"Every planation in the South that "owned" slaves was a concentration camp."