Meaning Of Grit

n.

Sand or gravel; rough, hard particles.
n.

The coarse part of meal.
n.

Grain, esp. oats or wheat, hulled and coarsely ground; in high milling, fragments of cracked wheat smaller than groats.
n.

A hard, coarse-grained siliceous sandstone; as, millstone grit; -- called also gritrock and gritstone. The name is also applied to a finer sharp-grained sandstone; as, grindstone grit.
n.

Structure, as adapted to grind or sharpen; as, a hone of good grit.
n.

Firmness of mind; invincible spirit; unyielding courage; fortitude.
v. i.

To give forth a grating sound, as sand under the feet; to grate; to grind.
v. t.

To grind; to rub harshly together; to grate; as, to grit the teeth.