n. An inclination to be partisan or biased; partiality
the GNU version of the Collaborative International Dictionary of English
n. The state of being a partisan, or adherent to a party; feelings or conduct characteristic of a partisan.
WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
n. an inclination to favor one group or view or opinion over alternatives
Word Usage
"At a battery factory in Michigan this past week, he urged Americans to pressure members of Congress to stop what he called partisanship and gridlock that he said have undermined public confidence."