FREDERICK, a city, capital of a cognominal county in the state of Maryland, North America, stands on the Carroll Creek, a tributary of the Monocacy, 63 miles W.N.W. of Annapolis. It is well and regularly built, and being situated in a rich agricultural district it carries on an extensive trade. It is connected by a branch with the Baltimore and Ohio railway. The public buildings include a courthouse, county jail, market-house, and a college chartered in 1850. Pop. (1850) 6028.