con·sti·tu·tion·al·i·ty \|känztəˌt(y)üshəˈnaləd.ē, -än(t)stəˌt(y)-, rapid -än(t)səˌt(y)- or -än(t)ˌst(y)-; -ətē, -i\noun (-es) 1.: the quality or state of being constitutional < with the restoration of constitutionality, a distinguished lawyer … came to power — Rodrigo Niró > 2.: the quality or state of being consistent with the provisions of a constitution (as the United States Constitution)