arb

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WORDNET DICTIONARY

Noun arb has 1 sense

arb(n = noun.person) arbitrager, arbitrageur - someone who engages in arbitrage (who purchases securities in one market for immediate resale in another in the hope of profiting from the price differential);

is a kind of businessman, man of affairs

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CIDE DICTIONARY

arb, n. [Shortened from arbitrageur.].

Someone who engages in arbitrage (who purchases securities in one market for immediate resale in another in the hope of profiting from the price differential); shortened form of arbitrageur. [WordNet 1.5]