smudge verb definition in Art equipment topic from the Oxford Advanced Learner's Dictionary

smudge

 verb: Art equipment topic
[transitive, intransitive] smudge (something) to touch or rub something, especially wet ink or paint, so that it is no longer clear; to become not clear in this way He had smudged his signature with his sleeve. Tears had smudged her mascara. Her lipstick had smudged.