(intransitive, transitive) To perform the functions of some office. / (intransitive, transitive, sports) To serve as umpire or referee.

A person appointed to office

Of a system: manufactured commercially and then tailored for specific uses.

The people elected to government or employed in the civil service.

(obsolete) Obliging, attentive, eager to please. / Offensively intrusive or interfering in offering advice and services.

(idiomatic) At one's own instigation, of one's own accord.

The liturgy of the Church of England, first compiled by Thomas Cranmer in 1549 after the (Act of Uniformity).

Atop / Very close to, in any orientation or in time. / (idiomatic) In addition to something else. / (idiomatic) Fully informed about, and in control of, something; up to speed with.

Not engaged in an assigned task, duty or occupation.

(archaic) Used in similes to describe the appearance of an untidy or bedraggled person.