To test something using the conditions that it was designed to operate under, especially out in the real world instead of in a laboratory or workshop.

(idiomatic) A public place where strangers, paupers, and criminals are buried.

plural of potter's field

(idiomatic) Any area, non-dependent of locale, space, or contour, that contains the debris of wreckage, impact, sinking, or other material that once constituted a complete object. Debris fields can be found at the site of air crashes, water vessel sinking, explosions of buildings, collapses, and other events that render a whole entity into components, pieces, or other non-whole items.

(physics) The field of force that is due to the interaction of electric and magnetic forces of charged bodies

(sports) referring to track and field athletics.

A playing field on which the game of soccer is played.

A playing field on which the game of baseball is played.

In photography, the distance in front of and behind the subject that appears to be in focus.

A form of hockey played on a grassed pitch with a hard rubber ball instead of a puck.