/ Dictionary / Index F field stop: Meaning and Definition of Find definitions for: field' stop" Pronunciation: [key] — Optics. Optics. the aperture that limits the field of view of a lens or system of lenses. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. fieldstone field strength Related Content Daily Word Quiz: supine Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language