Antifederal party

[ an-tee-fed-er-uh l, -fed-ruh l, an-tahy- ]
/ ˌæn tiˈfɛd ər əl, -ˈfɛd rəl, ˌæn taɪ- /

noun U.S. History.

the party that, before 1789, opposed the adoption of the proposed Constitution and after that favored its strict construction.
See also states' rights.