# planation

> English word · Noun · IPA /pleɪˈneɪʃən/

## Definitions
1. The formation of a flat surface by erosion and deposition
2. The morphological transformation of a three-dimensional structure into a two-dimensional one through development or evolution

## Etymology
From plane + -ation.

## Source
Compiled from Wiktionary via kaikki.org (CC BY-SA). Data vintage: 2026-05-06.
Canonical page: https://plainspell.com/en/word/planation