IPA: /ɡreɪˈdeɪʃən/
KK: /grəˈdeɪʃən/
A step or stage in a process where something changes gradually, such as colors or levels.
The artist used a smooth gradation of colors to create depth in the painting.
Gradation → It is formed from "gradus" (meaning step or degree) and the suffix "-ation" (indicating a process or action). The word "gradation" refers to the process of changing or varying in steps or degrees.
Think of 'steps' ('gradus') that lead to a change or variation — that's what gradation means.