<p><strong>Verb</strong></p><ul><li>to spread or daub (an oily, greasy, viscous, or wet substance) on or over something: to smear butter on bread.</li><li>to spread or daub an oily, greasy, viscous, or wet substance on: to smear bread with butter.</li><li>to stain, spot, or make dirty with something oily, greasy, viscous, or wet.</li><li>to sully, vilify, or soil (a reputation, good name, etc.).</li><li>to smudge or blur, as by rubbing: The signature was smeared.</li><li>Slang: to defeat decisively; overwhelm: They smeared the home team.</li></ul><p><strong>Noun</strong></p><ul><li>an oily, greasy, viscous, or wet substance, especially a dab of such a substance.</li><li>a stain, spot, or mark made by such a substance.</li><li>a smudge.</li><li>something smeared or to be smeared on a thing, as a glaze for pottery.</li><li>a small quantity of something spread thinly on a slide for microscopic examination.</li><li>vilification: a smear by a cheap gossip columnist.</li></ul>