(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)

(physics) The emission of electrons from a metal or semiconductor, under the influence of a strong electric field, by quantum tunnelling.

(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.

To go out onto the playing field. / To begin military operations. / (horse racing) To stake one's money against the favourite, taking the chances of the field against the chance of one horse.

(military) In certain nations the highest military rank, ranking below only the commander in chief; now essentially disused.

(baseball) The part of a baseball field which is beyond the infield and straight ahead left if you stand on home plate and face the pitcher.

(baseball) The part of a baseball field which is beyond the infield and to your right if you stand on home plate and face the pitcher.

(military, chiefly US) An airfield outside of the homebase.

(UK, horseracing) To cut one's losses by betting on every racehorse other than the crowd favorite. / To have numerous romantic partners, without or before committing exclusively to one.