• (n.) The state or quality of having crust or being like crust; hardness. • (n.) The quality of being crusty or surly.
Crust'i·ness (-ĭ-nĕs) noun 1. The state or quality of having crust or being like crust; hardness. 2. The quality of being crusty or surly. « Old Christy forgot his usual crustiness . W. Irving. »