a combination of the coarser parts of ground wheat the finest bran, separated from the fine flour and coarse bran in bolting; -- formerly regarded as valuable only for feed; but now, after separation of the bran, used for making the best quality of flour. middlings contain a large proportion of gluten.-in the southern and western parts of the united states, the portion of the hog between the ham and the shoulder; bacon; -- called also middles.