- scum⇄noun 1a. a thin layer that rises to the top of a liquid.
Ex. When Mother makes jelly, she skims off the scum. Green scum floated on top of the pond. The idea is prevalent that algae, especially those which form a scum on the water, are loathsome or - scum⇄scum, noun, verb, scummed,scumming.
- scum⇄v.i. to form scum; become covered with a scum.
- scum⇄v.t. 1. to remove scum from; skim.
2. to form scum on; cover with scum.
Ex. A thick mist scummed the windshields (Time).