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focus
WIKTIONARY
focus
Noun
  • A point at which reflected or refracted rays of light converge. countable, optics
  • A point of a conic at which rays reflected from a curve or surface converge. countable, geometry
  • The fact of the convergence of light on the photographic medium. uncountable, photography, cinematography
  • The quality of the convergence of light on the photographic medium. uncountable, photography, cinematography
  • Concentration of attention. uncountable
  • The exact point of where an earthquake occurs, in three dimensions (underneath the epicentre). countable, seismology
  • The indicator of the currently active element in a user interface. computing, graphical user interface
  • The most important word or phrase in a sentence or passage, or the one that imparts information. linguistics
Verb
  • To cause (rays of light, etc) to converge at a single point. transitive
  • To adjust (a lens, an optical instrument) in order to position an image with respect to the focal plane. transitive
  • To concentrate one's attention. transitive, followed by on or upon
  • To concentrate one’s attention. intransitive
  • To transfer the input focus to (a visual element), so that it receives subsequent input. computing, graphical user interface, transitive
BABYLON ENGLISH
focus v.
adjust the focus of; make clear, bring into focus; bring to a focus; concentrate
center, hub; area in a dialog box which receives input (Computers)
HENGLISH - ADVANCED VERSION
focus
focus
\fo"cus\ (?), v. t. [imp. & p. p. focused (?); p. pr. & vb. n. focusing.] to bring to a focus; to focalize; as, to focus a camera. hunt.
focus
\fo"cus\ (?), n.; pl. e. focuses (#), l. foci (#). [l. focus hearth, fireplace; perh. akin to e. bake. cf. curfew, fuel, fusil the firearm.]
1. (opt.) a point in which the rays of light meet, after being reflected or refrcted, and at which the image is formed; as, the focus of a lens or mirror.
2. (geom.) a point so related to a conic section and certain straight line called the directrix that the ratio of the distace between any point of the curve and the focus to the distance of the same point from the directrix is constant.
note: thus, in the ellipse fghklm, a is the focus and cd the directrix, when the ratios fa:fe, ga:gd, ma:mc, etc., are all equal. so in the hyperbola, a is the focus and cd the directrix when the ratio ha:hk is constant for all points of the curve; and in the parabola, a is the focus and cd the directrix when the ratio ba:bc is constant. in the ellipse this ratio is less than unity, in the parabola equal to unity, and in the hyperbola greater than unity. the ellipse and hyperbola have each two foci, and two corresponding directrixes, and the parabola has one focus and one directrix. in the ellipse the sum of the two lines from any point of the curve to the two foci is constant; that is: ag+gb=ah+hb; and in the hyperbola the difference of the corresponding lines is constant. the diameter which passes through the foci of the ellipse is the major axis. the diameter which being produced passes through the foci of the hyperbola is the transverse axis. the middle point of the major or the transverse axis is the center of the curve. certain other curves, as the lemniscate and the cartesian ovals, have points called foci, possessing properties similar to those of the foci of conic sections. in an ellipse, rays of light coming from one focus, and reflected from the curve, proceed in lines directed toward the other; in an hyperbola, in lines directed from the other; in a parabola, rays from the focus, after reflection at the curve, proceed in lines parallel to the axis. thus rays from a in the ellipse are reflected to b; rays from a in the hyperbola are reflected toward l and m away from b.
3. a central point; a point of concentration.
  similar words(6) 

 focus tube 
 aplanatic focus 
 conjugate focus 
 virtual focus 
 out of focus 
 in focus 
WORDNET 2.0
focus
Noun
1. the concentration of attention or energy on something; "the focus of activity shifted to molecular biology"; "he had no direction in his life"
(synonym) focusing, focussing, direction, centering
(hypernym) concentration, engrossment, absorption, immersion
(hyponym) particularism
(derivation) concenter, concentre, focalize, focalise
2. maximum clarity or distinctness of an image rendered by an optical system; "in focus"; "out of focus"
(hypernym) distinctness, sharpness
(derivation) focalize, focalise, sharpen
3. maximum clarity or distinctness of an idea; "the controversy brought clearly into focus an important difference of opinion"
(hypernym) clarity, lucidity, pellucidity, clearness, limpidity
(derivation) concenter, concentre, focalize, focalise
4. a central point or locus of an infection in an organism; "the focus of infection"
(synonym) focal point, nidus
(hypernym) point
(part-holonym) focal infection
5. special emphasis attached to something; "the stress was more on accuracy than on speed"
(synonym) stress
(hypernym) emphasis, accent
6. a point of convergence of light (or other radiation) or a point from which it diverges
(synonym) focal point
(hypernym) point
(derivation) focalize, focalise
7. a fixed reference point on the concave side of a conic section
(hypernym) point
Verb
1. direct one's attention on something; "Please focus on your studies and not on your hobbies"
(synonym) concentrate, center, centre, pore, rivet
(hypernym) think, cogitate, cerebrate
(hyponym) steep, immerse, engulf, plunge, engross, absorb, soak up
(verb-group) rivet
(derivation) focusing, focussing, direction, centering
2. cause to converge on or toward a central point; "Focus the light on this image"
(antonym) blur
(hypernym) sharpen
(hyponym) refocus
(derivation) focal point
3. bring into focus or alignment; to converge or cause to converge; of ideas or emotions
(synonym) concenter, concentre, focalize, focalise
(hypernym) align, aline, line up, adjust
(hyponym) refocus
4. become focussed or come into focus; "The light focused"
(synonym) focalize, focalise
(antonym) blur, dim, slur
(hypernym) adjust, conform, adapt
(derivation) focal point
5. put (an image) into focus; "Please focus the image; we cannot enjoy the movie"
(synonym) focalize, focalise, sharpen
(antonym) blur, blear
(hypernym) adjust, set, correct
(hyponym) refocus
(cause) focalize, focalise
(see-also) focus on, center on, revolve around, revolve about, concentrate on, center
ENGLISH WIKIPEDIA - THE FREE ENCYCLOPEDIA
FOCUS
FOCUS is a computer programming language and development environment. It is a language used to build database queries, and is regarded as a fourth-generation programming language (4GL). Produced by Information Builders Inc., it was originally developed for data handling and analysis on the IBM mainframe. As newer systems were developed and smaller computers became more powerful, the available platforms for FOCUS were extended to personal computers and in 1997, to the World Wide Web in the WebFOCUS product.
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Focus
Focus, FOCUS, or foci may refer to:
In science, mathematics or computing:Focus (cognitive process), selectively concentrating on one aspect of the environment while ignoring other thingsFocus (computing), which of a number of GUI elements currently accepts keyboard inputFocus (optics), a point toward which light rays are made to convergeFocus (linguistics), a concept referring to the way information in one phrase relates to information that has come beforeFocus (earthquake), an earthquake's underground point of origin or hypocenterEpileptic focusFOCUS, a database reporting programFOCUS (hardware), a CPU architectureHelicon Focus, an image software programFocus (geometry), a key point in specifying a conic section or other plane curveSamsung Focus, a smartphone manufactured by Samsung which runs Microsoft Windows Phone
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Focus…
Bernard Edwards, Jr., better known as Focus..., is an Atlanta-based record producer who first rose to fame when signed to Dr. Dre's Aftermath Entertainment. Since then he has produced tracks for Dr. Dre, Eminem, Snoop Dogg, Kendrick Lamar, Lil Wayne, Jadakiss, Christina Aguilera, Jennifer Lopez, Beyoncé Knowles, 50 Cent, Busta Rhymes, Bishop Lamont, Tony Yayo, Stat Quo, Outlawz, The Game, Jay Rock, Schoolboy Q, Mac Dre, Ice Cube, Anderson Paak, Jon Connor, Joe, Marsha Ambrosius , Slum Village amongst many others.
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Pronunciations In Different Accents
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