Definition of grit
(Entry 1 of 2)
b
: a hard sharp granule (as of sand)
also
: material (as many abrasives) composed of such granules
2
: any of several sandstones
3a
: the structure of a stone that adapts it to grinding
b
: the size of abrasive particles usually expressed as their mesh
4
: firmness of mind or spirit : unyielding courage in the face of hardship or danger
managed to survive by his grit and guile
5
capitalized
: a Liberal in Canadian politics
grit
verb
gritted; gritting
Definition of grit (Entry 2 of 2)
: to give forth a grating sound
dry snow gritting beneath our feet
1
: to cause (one's teeth) to grind or grate
gritted his teeth and faced the challenge
2
: to cover or spread with grit
especially
: to smooth (a material, such as marble) with a coarse abrasive
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Merriam-Webster unabridged
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Time Traveler for grit
The first known use of grit was before the 12th century
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