Branch  —n. 1 limb of a tree or bough. 2 lateral extension or subdivision, esp. Of a river, road, or railway. 3 subdivision of a family, knowledge, etc. 4 local office etc. Of a large business. —v. (often foll. By off) 1 diverge. 2 divide into branches.  branch out extend one's field of interest. [latin branca paw]