etch /ɛt͡ʃ/ verb4 •To cut into a surface with an acid or other corrosive substance in order to make a pattern. Best known as a technique for creating printing plates, but also used for decoration on metal, and, in modern industry, to make circuit boards. •(figurative) To make a lasting impression.The memory of 9/11 is etched into my mind.His sorrow was etched on his face. •To engrave a surface. •To sketch; to delineate.There are many such empty terms to be found in some learned writers, to which they had recourse to etch out their system. — 1705 formsetched · etching · etches