Quin·cy (kwĭn'zē, -sē) American Revolutionary patriot who traveled to England to present the colonists' grievances (1774-1775). His son Josiah (1772-1864) was a U.S. representative from Massachusetts (1804-1813) who opposed involvement in the War of 1812 and served as mayor of Boston (1823-1829) and president of Harvard University (1829-1845).