The part of the Roman Catholic Mass that is the same every day

A noun "ordinary" represents a person with authority, such as a bishop, judge, or the chaplain of newgate prison.

A common or regular thing, such as a standard meal, a standard geometric design on a coat of arms, an ordinary person or thing, the usual course of things, a penny farthing bicycle, or a part of the christian liturgy that is constant regardless of the date.

A noun "ordinary" represents a book or rule prescribing regular conduct or the order of service, especially in christianity.

(law, of a judge) Having regular jurisdiction; now only used in certain phrases.

Being part of the natural order of things; normal, customary, routine.

Having no special characteristics or function; everyday, common, mundane; often deprecatory.

(Australia, New Zealand, colloquial, informal) Bad or undesirable.