/ ˈkæpɪtl; NAmE / noun
1.
(usually the Capitol ) [ sing. ] the building in Washington DC where the US Congress (= the national parliament) meets to work on new laws
2.
[ usually sing. ] a building in each US state where politicians meet to work on new laws :
the California state capitol
••
WORD ORIGIN
from Old French capitolie , capitoile , later assimilated to Latin Capitolium (from caput , capit- head).