Trevelyan n 1: English historian and son of Sir George Otto Trevelyan whose works include a social history of England and a biography of Garibaldi (1876-1962) [syn: {George Macaulay Trevelyan}] 2: English historian who wrote a history of the American revolution and a biography of his uncle Lord Macaulay (1838-1928) [syn: {George Otto Trevelyan}, {Sir George Otto Trevelyan}]