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Definition of flint:

  1. A massive, somewhat impure variety of quartz, in color usually of a gray to brown or nearly black, breaking with a conchoidal fracture and sharp edge. It is very hard, and strikes fire with steel.
  2. A piece of flint for striking fire; - formerly much used, esp. in the hammers of gun locks.
  3. Anything extremely hard, unimpressible, and unyielding, like flint.


rock, rocklike, unrepentant, stony, boulder, hematite, cigarette paper, rocky, basalt, silica, chalk, fag, spar, gravel, chew, adamant, feldspar, obstinate, pebble, butt, stone, cheroot, granitelike, cigar, haematite, crystal, Flint River, cussed, flinty, felspar, obdurate, bouldered, pinnacle, granitic, scree, ciggy, cigarette, briar, alabaster, bong, shingle, mineral, meteorite, bouldery, igneous.

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