Grit  —n. 1 particles of stone or sand, esp. As irritating or hindering. 2 coarse sandstone. 3 colloq. Pluck, endurance. —v. (-tt-) 1 spread grit on (icy roads etc.). 2 clench (the teeth). 3 make a grating sound.  gritter n. Gritty adj. (-ier, -iest). [old english]