1.verbTo 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."
2.verbTo have a substance smeared on (a surface).
"She smeared her lips with lipstick."
3.verbTo 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."
4.verbTo become spread by smearing.
"The paint is still wet — don't touch it or it will smear."
5.verbTo climb without using footholds, using the friction from the shoe to stay on the wall.