(chemistry) The number of bonds between a pair of atoms in a molecule

(An order to observe) a (temporary) speed restriction.

(UK, Ireland, military, slang) In a state of mess or chaos.

plural of hospital order

A court order requiring an offender who is found not guilty by reason of insanity to be admitted to a psychiatric hospital.

plural of speed order

(UK, dated, derogatory) the lower classes in society

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.

(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.