(set theory) In the context of sets equipped with an order (especially, the context of totally ordered sets), the characteristic of being a member of some equivalence class of such sets under the equivalence relation "existence of an order-preserving bijection".

(graphical user interface) The sequence in which a user can navigate from one control to the next by pressing the Tab key.

plural of tab order

plural of order of precedence

(of troops etc.) in an arrangement in compact units at close intervals and distances, as for marching and/or drill.

(military) A military unit formed up so as to allow space between its ranks. / (nautical) A naval formation in which ships are four cables'-length (2880 feet) apart.

plural of minor order / Used other than figuratively or idiomatically: see minor, orders.

A book or ledger that lists customer orders, especially orders that have not yet been filled.

(Christianity) The sacrament of ordination to the rank of minister or (in Catholicism and Orthodoxy) deacon, priest, or bishop.

plural of hospital order