Definition of gerrymanders:
(v) :
(transitive, derogatory) To divide a geographic area into voting districts in such a way as to give an unfair advantage to one party in an election.
(n) :
(derogatory) The act of gerrymandering.
(v) :
(transitive, derogatory, by extension) To draw dividing lines for other types of districts in an unintuitive way to favor a particular group or for other perceived gain.
(v) :
(transitive, derogatory, by extension) To change the franchise or voting system in such a way as to give an unfair advantage to one party in an election.
(v) :
(transitive, derogatory, by extension, chiefly UK and Ireland) To deliberately bring in voters of one's own party or displace voters of another party from a voting district in such a way as to give an unfair advantage to one party in an election.
(n) :
(derogatory) A voting district skewed by gerrymandering.