A bet of the same value as the initial one, resulting in either a doubling of a loss, or it being cancelled.

(chemistry) Either of a pair of orbitals, of two molecules or fragments, that overlap to form a bond; especially the HOMO and LUMO orbitals

(idiomatic) To either improve one's behavior or else be required to leave; to either improve one's performance in an activity or else withdraw from that activity completely.

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.

A scale whose values can be compared; formally, a scale whose set of values is totally ordered.

(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).

plural of ore body