Turn \Turn\, v. t. To make a turn about or around (something); to go or pass around by turning; as, to turn a corner. The ranges are not high or steep, and one can turn a kopje instead of cutting or tunneling through it. --James Bryce. {To turn turtle}, to capsize bottom upward; -- said of a vessel. [Naut. slang] -- {To turn under} (Agric.), to put, as soil, manure, etc., underneath from the surface by plowing, digging, or the like.