(optics) The angular extent of what can be seen, either with the eye or with an optical instrument or camera.

A species of vole, Microtus agrestis.

(chiefly US) A group of athletic sports, consisting mainly of various kinds of running, jumping and throwing, that take place on a track and the enclosed field.

(agriculture) A flooded field where rice is grown.

a network of interconnected glaciers or ice streams having a common source / a large expanse of floating ice (several miles long)

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.

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