01 n. Judgment by an arbiter; authoritative determination.
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1.
Judgment by an arbiter; authoritative determination.[Archaic]
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2.
A traffic in bills of exchange (see Arbitration of Exchange).(Com.)
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3.
the simultaneous or near simultaneous purchase and sale of the same or closely linked securities or commodities in different markets to make a profit on the (often small) differences in price.(Finance)