fine powdery foodstuff obtained by grinding and sifting the meal of a cereal grain
source: WordNet 3.0
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; as, flour of emery; flour of mustard.
source: Webster 1913
verb
cover with flour
Flour fish or meat before frying it.
source: WordNet 3.0
convert grain into flour
source: WordNet 3.0
To grind and bolt; to convert into flour; as, to flour wheat.