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a. Small loose grains of worn or disintegrated rock.
b. Geology A sedimentary material, finer than a granule and coarser than silt, with grains between 0.06 and 2.0 millimeters in diameter.
2. often sands A tract of land covered with sand, as a beach or desert.
a. The loose, granular, gritty particles in an hourglass.
b. sands Moments of allotted time or duration: "The sands are numb'red that makes up my life" (Shakespeare).
4. Slang Courage; stamina; perseverance: "She had more sand in her than any girl I ever see; in my opinion she was just full of sand" (Mark Twain).
5. A light grayish brown to yellowish gray.
tr.v. sand·ed, sand·ing, sands
1. To sprinkle or cover with or as if with sand.
2. To polish or scrape with sand or sandpaper.
3. To mix with sand.
4. To fill up (a harbor) with sand.

[Middle English, from Old English.]