To spread (a substance, especially one that colours or is dirty) across a surface by rubbing.
The artist smeared paint over the canvas in broad strokes.
To have a substance smeared on (a surface).
She smeared her lips with lipstick.
To damage someone's reputation by slandering, misrepresenting, or otherwise making false accusations about an individual, their statements, or their actions.
The opposition party attempted to smear the candidate by spreading incorrect and unverifiable rumors about their personal behavior.
To become spread by smearing.
The paint is still wet — don't touch it or it will smear.
To climb without using footholds, using the friction from the shoe to stay on the wall.