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Grind Grind, v. t. [imp. & p. p. Ground; p. pr. & vb. n. Grinding.] [AS. grindan; perh. akin to L. frendere to gnash, grind. Cf. Grist.] 1. To reduce to powder by friction, as in a mill, or with the teeth; to crush into small fragments; to produce as by the action of millstones. Take the millstones, and grind meal. --Is. xivii. 2. 2. To wear down, polish, or sharpen, by friction; to make smooth, sharp, or pointed; to whet, as a knife or drill; to rub against one another, as teeth, etc. 3. To oppress by severe exactions; to harass. To grind the subject or defraud the prince. --Dryden. 4. To study hard for examination. [College Slang]