ordinary

Concise Oxford English Dictionary © 2008 Oxford University Press:
ordinary/ˈɔːdnri/

▶adjective

• 1 with no distinctive features; normal or usual.

  ■ not interesting or exceptional.

• 2 (of a judge, archbishop, or bishop) exercising authority by virtue of office and not by deputation.

▶noun (pl. ordinaries)

• 1 Law, Brit. a judge exercising authority by virtue of office and not by deputation.

• 2 (the Ordinary) a clergyman, such as an archbishop in a province or a bishop in a diocese, with immediate jurisdiction.

• 3 (Ordinary) those parts of a Roman Catholic service, especially the Mass, which do not vary from day to day.

  ■ a rule or book laying down the order of divine service.

• 4 Heraldry any of the simplest principal charges used in coats of arms.

• 5 archaic a meal provided at a fixed time and price at an inn.

• 6 historical, chiefly N. Amer. a penny-farthing bicycle.

– phrases
in ordinary Brit. (in titles) by permanent appointment, especially to the royal household.
out of the ordinary unusual.

– derivatives
ordinarily adverb,
ordinariness noun.

– origin ME: the noun partly via OFr.; the adjective from L. ordinarius ‘orderly’, from ordo, ordin- ‘order’.