noun. undefined

noun. The distinctness or clarity of an image rendered by an optical system.

noun. The state of maximum distinctness or clarity of such an image.

noun. An apparatus used to adjust the focal length of an optical system in order to make an image distinct or clear.

noun. undefined

noun. A point at which rays of light or other radiation converge or from which they appear to diverge, as after refraction or reflection in an optical system.

noun. undefined

noun. undefined

noun. A center of interest or activity.

noun. Close or narrow attention; concentration.

noun. A condition in which something can be clearly apprehended or perceived.

noun. The region of a localized bodily infection or disease.

noun. The point of origin of an earthquake.

noun. A fixed point whose relationship with a directrix determines a conic section.

intransitive verb. To cause (light rays, for example) to converge on or toward a central point; concentrate.

intransitive verb. undefined

intransitive verb. To render (an object or image) in clear outline or sharp detail by adjustment of one's vision or an optical device; bring into focus.

intransitive verb. To adjust (a lens, for example) to produce a clear image.

intransitive verb. To direct toward a particular point or purpose.

intransitive verb. To converge on or toward a central point of focus; be focused.

intransitive verb. To adjust one's vision or an optical device so as to render a clear, distinct image.

intransitive verb. To concentrate attention or energy.

To bring or adjust to a focus; cause to be in focus; focalize; collect in one point; concentrate.

noun. In pathology, a center of morbid action; one of the primary or principal lesions.

noun. In optics, a point at which rays of light that originally diverged from one point meet again, or a point from which they appear to proceed.

noun. In geometry, a point from which the distances to any point of a given curve are in a syzygetic relation.

noun. In the theory of perspective, with reference to two planes in perspective, one of four points—two, F₁ and F₂, on one plane, and two, f₁ and f₂, on the other—such that the angles between two points on the first plane measured at F₁ are equal to the angles between the corresponding points on the other plane measured at f₁, and so with the pair of foci F₂ and f₂.

noun. Figuratively (with a consciousness of the classical Latin meaning), a central or gathering point, like the fire or hearth of a household; the point at or about which anything is concentrated; a center of interest or attraction.

transitive verb. To bring to a focus; to focalize; as, to focus a camera.

noun. A point in which the rays of light meet, after being reflected or refracted, and at which the image is formed

noun. A point so related to a conic section and certain straight line called the directrix that the ratio of the distance between any point of the curve and the focus to the distance of the same point from the directrix is constant.

noun. A central point; a point of concentration.

noun. See under Aplanatic.

noun. the focus for rays which have a sensible divergence, as from a near object; -- so called because the positions of the object and its image are interchangeable.

noun. a vacuum tube for Rœntgen rays in which the cathode rays are focused upon the anticathode, for intensifying the effect.

noun. the focus for parallel rays.

noun. undefined

noun. a point at which reflected or refracted rays of light converge.

noun. a point of a conic at which rays reflected from a curve or surface converge.

noun. The fact of the convergence of light on the photographic medium.

noun. The quality of the convergence of light on the photographic medium.

noun. concentration of attention.

noun. the exact point of where an earthquake occurs, in three dimensions.

noun. The indicator of the currently active element in a user interface.

noun. The most important word or phrase in a sentence or passage, or the one that imparts information

verb. To cause (rays of light, etc) to converge at a single point.

verb. To adjust (a lens, an optical instrument) in order to position an image with respect to the focal plane.

verb. To concentrate one's attention.

verb. To make (a liquid) less diluted.

verb. To concentrate one’s attention.

"I think my grandfather is trying to tell me something. * focus Nate focus*"

scatter  

acoustic focus  actinic focus  chemical focus  depth of focus  equivalent focus  

solar focus  

focal  

focus group  focused  focusing  in focus  out of focus  

accent  adapt  adjust  clarity  clearness  

crocus  hocus  locus  refocus  

aim  analysis  awareness  concentration  concept  

adductor  approach  asymptote  attractant  attrahent  

foci  

focuses  focussed  focussing