free' soil' U.S. Hist.
a region, esp. a U.S. territory, prohibiting slavery prior to the Civil War.
free-soilPronunciation: (frē'soil'), [key]
—adj. U.S. Hist.
pertaining to or opposing the extension of slavery in the Territories.
pertaining to or characteristic of the Free Soil party.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.