a member of the Free Soil party or a supporter of its principles.
Origin of Free-Soiler
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
Examples from the Web for free-soiler
Historical Examples of free-soiler
His enemies accused him of being a Free-soiler, an abolitionist in disguise.The Anti-Slavery Crusade