stock·brok·er / ˈstäkˌbrōkər/ • n. a broker who buys and sells securities on a stock exchange on behalf of clients.DERIVATIVES: stock·brok·er·age / -ˌbrōk(ə)rij/ n.stock·brok·ing / -ˌbrōking/ n.

stockbroker a broker who buys and sells securities on a stock exchange on behalf of clients; the term is recorded from the early 18th century.
stockbroker belt an affluent residential area outside a large city, supposedly typical of the lifestyle of a successful stockbroker.
Stockbroker's Tudor an associated style of mock-Tudor architecture.