Wordnet 3.0
NOUN (1)
1. 
 the United States federal department responsible for enforcing federal laws (including the enforcement of all civil rights legislation); 
 created in 1870; 
[syn: Department of Justice, Justice Department, Justice, DoJ]
WordNet (r) 3.0 (2006):
Justice Department
    n 1: the United States federal department responsible for
         enforcing federal laws (including the enforcement of all
         civil rights legislation); created in 1870 [syn:
         Department of Justice, Justice Department, Justice,
         DoJ]