(modern) B-field. / (dated) H-field.

(cricket) A rule governing the placement of fielders (within an oval drawn on the pitch) at certain times during the innings of a one-day match.

An area under which are reserves of petroleum, especially one with productive oil wells.

(military) A day for manoeuvres and tactical exercises in "the field". / A school day for athletic events; a sports day. / A day of class taken away from school for a field trip.

Synonym of virgin territory. / An oilfield that has not yet been exploited.

A temporary fortification in the field / (in scientific research) The collection of raw data, in the field

singular of Elysian Fields

The area of grass (within the boundary) on which a cricket match is played. / A cricket ground.

A field on which a game, especially a ball game, is played. / (figuratively) Any place or context within which competitive activity takes place, such as market competition between companies.

(American football) A playing field on which the game of American football is played. / (Association football) A playing field on which the game of Association football is played.