While the lake is the largest man-made lake around, some say it is not the state's largest lake, because some of it is in Ohio. The dam that formed the lake on the Shenango River was completed in 1934. The largest man-made lake built by the Army Corps of Engineers in Pennsylvania is Raystown Lake.
postulate (plural postulates) 1  Something assumed without proof as being self-evident or generally accepted, especially when used as a basis for an argument. 2  A fundamental element; a basic principle. ( 3 logic) An axiom. 4  A requirement; a prerequisite.
1. singular noun [oft by NOUN] 1  The post is the public service or system by which letters and packages are collected and delivered. 2  You can use post to refer to letters and packages that are delivered to you. 3  Post is used to refer to an occasion when letters or packages are delivered.