/ ˈɑːbɪtreɪt; NAmE ˈɑːrb-/ verb
arbitrate (in / on) (sth) to officially settle an argument or a disagreement between two people or groups :
[ v ]
to arbitrate in a dispute
A committee was created to arbitrate between management and the unions.
[also vn ]
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WORD ORIGIN
mid 16th cent.: from Latin arbitrat- judged, from arbitrari , from arbiter judge, supreme ruler.