n. An obsolete spelling of flower (in the botanical and derived senses).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.n. A snow-like mass of finely crystallized saltpeter used in the manufacture of gunpowder.An obsolete spelling of flower.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.To grind and bolt; convert into flour: as, to flour wheat.To sprinkle with flour.