grind/graɪnd/USA pronunciationv.,ground/graʊnd/USA pronunciation grind•ing,n. v.
to wear down, make smooth, or sharpen (something) by rubbing or friction:[~ + object]to grind a lens; to grind knives.
to crush (something) into small particles, as by pounding; pulverize: [~ + object]She accidentally ground the dirt into the rug.[~ + up + object]The glass bottles were ground up for recycling.
to oppress, torment, or crush:[~ + down + object]They were ground down by poverty.
to grate together; grit:[~ + object]She used to grind her teeth.
to operate by turning a crank:[~ + object]to grind a hand organ.
to produce by crushing or hard rubbing:[~ + object]The mill grinds flour.
to (cause to) rub harshly; grate: [no object]The gears ground whenever I shifted.[~ + object]I kept grinding the gears.
Informal Terms[~ + away] to work or study hard or for long hours.
Slang Terms[no object] (in a dance) to rotate the hips in a suggestive manner. Compare bump (def. 9).
grind out:
to produce in a routine or mechanical way: [~ + out + object]ground out another issue of the newspaper.[~ + object + out]Would they grind another issue out in time?
to extinguish (a cigarette or cigar) against a surface: [~ + out + object]He ground out his cigarette.[~ + object + out]He ground his cigarette out.