Meaning of Copperheadism

Cop•per•head•ism

Pronunciation: (kop'ur-hed-iz"um), [key]
— n.
  1. (during the Civil War) the advocacy of peace negotiations to restore the Union to its prewar condition, with continued slavery in the South.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.