- 1[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.
- 2[transitive] smudge something to make a dirty mark on a surface The mirror was smudged with fingerprints.
NAmE//smʌdʒ//Verb Forms present simple I / you / we / they smudge
he / she / it smudges
past simple smudged
-ing form smudging