flour

American Heritage® Dictionary of the English Language, Fourth Edition

1. n. A fine, powdery foodstuff obtained by grinding and sifting the meal of a grain, especially wheat, used chiefly in baking.
2. n. Any of various similar finely ground or powdered foodstuffs, as of cassava, fish, or bananas.
3. n. A soft, fine powder.
4. v. To cover or coat with flour.
5. v. To make into flour.

Century Dictionary and Cyclopedia

1. n. An obsolete spelling of flower (in the botanical and derived senses).
2. n. The finely ground meal of wheat or of any other grain; especially, the finer part of meal separated by bolting; hence, any vegetable or other substance reduced to a fine and soft powder: as, flour of emery; hop-flour.
3. n. A snow-like mass of finely crystallized saltpeter used in the manufacture of gunpowder. It is formed by cooling a solution of saltpeter from 180° to 70° F. in large shallow copper pans, and continually agitating it by hand or by machinery during the process of crystallization. The fine crystals settle to the bottom, are removed, and allowed to drain on inclined forms, when they are ready for washing.
4. An obsolete spelling of flower.
5. In mining, in the amalgamation process, the mercury is said to flour when it breaks up into fine globules, which, owing to the presence of some impurity, do not unite with the precious metal with which they are brought in contact. This defect is known as flouring, and also as sickening; both in Australia and on the Pacific coast of the United States.
6. To grind and bolt; convert into flour: as, to flour wheat.
7. To sprinkle with flour.

Wiktionary

1. n. Powder obtained by grinding or milling cereal grains, especially wheat, and used to bake bread, cakes, and pastry.
2. n. Powder of other material, e.g., wood flour produced by sanding wood.
3. n. Obsolete form of flower.
4. v. To apply flour to something; to cover with flour.

GNU Webster's 1913

1. n. The finely ground meal of wheat, or of any other grain; especially, the finer part of meal separated by bolting; hence, the fine and soft powder of any substance
2. v. To grind and bolt; to convert into flour.
3. v. To sprinkle with flour.

WordNet 3.0

1. v. cover with flour
2. v. convert grain into flour
3. n. fine powdery foodstuff obtained by grinding and sifting the meal of a cereal grain