from The American Heritage® Dictionary of the English Language, 4th Edition

  • n. The process of erosion and deposition in which a nearly level surface is produced, as by streams, wind, or ocean currents.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • 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.

from 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.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • n. the process of erosion whereby a level surface is produced


Latin plānum, flat surface; see plane1 + -ation.
(American Heritage® Dictionary of the English Language, Fourth Edition)



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