noun, verb, branned, bran⋅ning.| 1. | the partly ground husk of wheat or other grain, separated from flour meal by sifting. |
| 2. | to soak or boil in bran water, as in the tanning of hides. |

bran (brān)
n.
The outer layers of a cereal grain such as wheat, approximately 20 percent of which is indigestible cellulose, used as a source of dietary fiber.