The dictionary provides a systematic definition of concepts and terms associated with the Great Patriotic War. The leading role of the CPSU, issues of politics, economics, diplomacy and armed struggle are revealed, information about the partisan movement, the activities of the underground in the occupied territory is placed, the heroism of Soviet people at the front and behind enemy lines is shown. The dictionary contains about 2 thousand concepts and terms. The dictionary is designed for all interested in the history of the Great Patriotic War.