noun

• (Roman Catholicism, Anglicanism, Lutheranism, Eastern Orthodoxy) An administrative part of a diocese that has its own church.
  "With some of it on the south and more of it on the north of the great main thoroughfare that connects Aldgate and the East India Docks, St. Bede's at this period of its history was perhaps the poorest and most miserable parish in the East End of London."
• (US) An ecclesiastical society, usually not bounded by territorial limits, but composed of those persons who choose to unite under the charge of a particular priest, clergyman, or minister; also, loosely, the territory in which the members of a congregation live.

verb

• (transitive) To place (an area, or rarely a person) into one or more parishes.
  "[…] [m]akes possible, through the aid of the rural ministers, the development of the various phases of the District program, such as (a) Parishing of the District; (b) Interdenominational adjustment in the interest of rural religious advance […]"
• (intransitive) To visit residents of a parish.
  "[…] a chair immediately opposite to Tressady's place remained vacant. It was being kept for the eldest son of the house, his mother explaining carelessly to Lord Fontenoy that she believed he was "Out parishing somewhere, as usual.""