A trading order that is canceled unless executed within a designated time period. Related: open order. 
An order submitted to the electronic order book with a specified size and, at the option of the member firm, a specified limit price which either executes in full against eligible orders at the price of those orders or is rejected in full from the order book.
Type of order input into SETS. It is either completed in full against displayed orders or rejected in full.
An order submitted to the order book with a specified size and at the option of the member firm, a specified limit price which either executes in its entirety against eligible orders at the price of those orders or is rejected in full from the order book.