(baseball) The part of a baseball field which is beyond the infield and to the left of a person standing on home plate and facing the pitcher.

(mathematics) A field of plotted slopes of a differentiable function.

A trip, usually in a group and especially by students, to a place of special interest for education, research or exploration; a trip into the field.

A battlefield; any place where a duel is fought.

An area of academic concentration; a discipline.

plural of field marshal

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

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.

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