Alternative spelling of out of order

(business) A commercial document issued by a buyer to a seller, indicating the type, quantities and agreed prices for products or services the seller will provide to the buyer.

(set theory) A set having a specified total order.

(set theory, order theory) A total order of some set such that every nonempty subset contains a least element.

(set theory, order theory, transitive) To impose a well-order on (a set).

To be a crucial factor in determining the success of something.

(historical) The Orange Free State when annexed by Britain in 1900. Abbreviation ORC.

(Catholicism) The religious order of friars established by St Francis of Assisi.

A form of riveting involving a rotating peen tool mounted at an angle.

Orbital riveting.