noun.
An official of the Communist Party, often attached to a military unit, who was responsible for political education.
noun.
In the Soviet Union, the head of a commissariat.
WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
noun.
an official of the Communist Party who was assigned to teach party principles to a military unit
Word Usage
"… A commissar is a political officer whose position is equal to that of the commander of a given military unit and has the authority to countermand the orders of the commander."