noun (often initial capital letters) Fine Arts.
a group of American painters of the early 20th century whose genre paintings were derived from city life.
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British Dictionary definitions for ash can school
Ash Can School
a group of US painters including Robert Henri and later George Bellows, founded in 1907, noted for their depiction of the sordid aspects of city life
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012