from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. The state of being a copperhead; sympathy in the North for Southern secessionists during the American Civil War.

from The Century Dictionary and Cyclopedia

  • n. In the period of the civil war in the United States, northern sympathy with the rebellion.


From copperhead +‎ -ism. (Wiktionary)


  • Even the scandals of the Republican administration could not avail the Democrats unless a leader could be found free from the taint of treason and copperheadism and strong enough to hold the party North and South.

    The New Nation

  • With older brothers in the army he had supported his mother during the war, and had kept clear of copperheadism.

    The New Nation


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