A delivery in which the seller (or his/her broker) gives to the buyer only part of the agreed-upon quantity. For example, if an investor buys 1,000 shares and the selling broker delivers 700, this is a partial delivery. In such a situation, the buyer is not obligated to make payment until full delivery has been made. See also: Fail.
Delivery by a broker of less than the quantity stipulated in the contract. A broker who delivers 200 shares of a stock when 500 shares are due is making a partial delivery.