• Webster's Revised Unabridged Dictionary
    • n Zolaism The literary theories and practices of the French novelist Emile Zola 1840-1902); naturalism, esp. in a derogatory sense.
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Century Dictionary and Cyclopedia
    • n zolaism The characteristic quality of the works of Emile Zola (born 1840), a French novelist characterized by an excessively “realistic” treatment of the grosser phases of life; coarse “realism” or “naturalism.”
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Chambers's Twentieth Century Dictionary
    • n Zolaism zō′la-izm the literary principles and practice of the industrious French novelist Emile Zola (1840-1902)—an attempt at a so-called realism claimed to be a proper scientific view of human nature and human life. In effect Zola's books are dull and dirty, and his realism is not reality.
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In literature:

I suppose he would be accused of Zolaism, but he would frighten away many a nice lad from the wrong road.
"The Chequers" by James Runciman