n. 1. The act of covering with shingles; shingles, collectively; a covering made of shingles. [ 1913 Webster ]
2. (Metal) The process of expelling scoriae and other impurities by hammering and squeezing, in the production of wrought iron. [ 1913 Webster ]
Shingling hammer, a ponderous hammer moved by machinery, used in shingling puddled iron. -- Shingling mill, a mill or forge where puddled iron is shingled. [ 1913 Webster ]