Definitions for "sell short"
A trader is in a SHORT POSITION when she sells a currency pair.Longing is the...
When a trader sells a contract he does not already own, thereby creating a net short position. (See Going Short)
sell securities or commodities or foreign currency that is not actually owned by the seller, who hopes to cover (buy back) the sold items at a lower price and thus to earn a profit
Keywords:  prior, necessary, approval, sale, owned
Sale of a security not owned by the seller. Prior approval is necessary.