Palmetto State pal·met·tos·tate uncommon noun 1. a state in the Deep South; one of the original 13 colonies SynonymsSouth CarolinaPalmetto StateSC Related words Broader terms American state Parts United StatesConfederacyDeep South Part of ColumbiaCharlestonFlorenceGreenvillePee DeeSavannah WordNet 2.1 (Princeton University). WordNet 2.1 Copyright Princeton University. All rights reserved.