- (v.) The extraneous matter or impurities which rise to the surface of liquids in boiling or fermentation or which form on the surface by other means; also, the scoria of metals in a molten state; dross.
- (v.t.) To take the scum from; to clear off the impure matter from the surface of; to skim.
- (v.t.) To sweep or range over the surface of.
- (v.i.) To form a scum; to become covered with scum. Also used figuratively.
- (v.) refuse; recrement; anything vile or worthless.
Webster's Revised Unabridged Dictionary
| APA | Webster's. (2011). scum. Retrieved September 20, 2026, from http://smartdefine.org/scum/definitions/2059181 |
| Chicago | Webster's. 2011. "scum" http://smartdefine.org/scum/definitions/2059181 (accessed September 20, 2026). |
| Harvard | Webster's 2011, scum, Smart Define, viewed 20 September, 2026, <http://smartdefine.org/scum/definitions/2059181>. |
| MLA | Webster's. "scum" 28 May 2011. Web. 20 September 2026. <http://smartdefine.org/scum/definitions/2059181> |