/
ˈɑːbɪt(rə)ri/
adj.
- based on random choice or personal whim.
- (of power or a ruling body) autocratic.
- Mathematics (of a constant or other quantity) of unspecified value.
Derivative
- arbitrarily adv.
- arbitrariness n.
Etymology
ME: from L. arbitrarius, from arbiter ‘judge, supreme ruler’.