Free-soil

a. 1. Pertaining to, or advocating, the non-extension of slavery; -- esp. applied to a party which was active during the period 1846-1856. [ U.S. ] [ WordNet 1.5 ]

2. Pertaining to territory where slavery was prohibited. [ U.S. ] [ wns=1 ]
Syn. -- slaveless. [ WordNet 1.5 ]

-- Free"soil`er n. [U.S.] -- Free"-soil`ism n. [ U.S. ] [ 1913 Webster ]