aird, sib john, bart - Aird, sib john, bart; aird, sib john, bart - (1833-1911). British contractor. Born in London, Dec. 3, 1833, Aird joined his father as a contractor, and the firm soon built up a flourishing business. Having erected the Crystal Palace in 1851, the Airds under-took the construction of railways, docks, etc., not only in England, but nearly all over the world, and after the father's death the son was even more prosperous. In 1898-1902 he constructed the great dams at Assuan and Assiut on the Nile. From 1887 to 1905 he was Conservative member of Parliament for North Paddington, London, and in 1901 he was made a baronet. He died Jan. 6, 1911.