Definition of Library of Congress:
(N) :
a research library in Washington, D.C., serving as the library and research service for the United States Congress and the de facto national library of the United States.
(N) :
a 1945 American short documentary film about the Library of Congress, directed by Alexander Hammid, and produced by the Office of War Information.
(N) :
the research library that officially serves the United States Congress and is the de facto national library of the United States.