Movatterモバイル変換


[0]ホーム

URL:


Jump to content
WiktionaryThe Free Dictionary
Search

focus

From Wiktionary, the free dictionary

English

[edit]
EnglishWikipedia has an article on:
Wikipedia

Etymology

[edit]

Borrowed fromLatinfocus(hearth, fireplace); see there for more.Doublet offuel.

Kepler introduced the term into mathematics and the sciences in describing elliptical orbits of planets (quote from Nicholas Mee) :"One of the interesting properties of an ellipse is that if there were a light bulb at one focus, then all the light that it emits would reflect off the ellipse and converge at the other focus. This is why Kepler originally used the name focus for these points."[1]

Pronunciation

[edit]

Noun

[edit]

focus (countable anduncountable,pluralfociorfocusesorfocusses)

  1. (countable, optics) Apoint at whichreflected orrefractedrays oflightconverge.
    Synonym:focal point
    The heat of sunlight at thefocus of a magnifying glass can easily set dry leaves on fire.
  2. (countable, geometry) Apoint of aconic at whichraysreflected from a curve or surfaceconverge.
  3. (uncountable, photography, cinematography) The fact of the convergence of light on the photographic medium.
    Unfortunately, the license plate is out offocus in this image.
    • 2013 July-August,Catherine Clabby, “Focus on Everything”, inAmerican Scientist:
      Not long ago, it was difficult to produce photographs of tiny creatures with every part infocus.[]A photo processing technique calledfocus stacking has changed that. Developed as a tool to electronically combine the sharpest bits of multiple digital images,focus stacking is a boon to biologists seeking fullfocus on a micron scale.
  4. (uncountable, photography, cinematography) The quality of the convergence of light on the photographic medium.
    During this scene, the boy’s face shifts subtly from softfocus into sharpfocus.
  5. (uncountable)Concentration ofattention.
    I believe I can bring the high degree offocus required for this important job.
  6. (countable) Something to which activity, attention or interest is primarily directed.
    Synonym:focal point
    My studies are my mainfocus right now.
  7. (countable, seismology) The exact point of where an earthquake occurs, in three dimensions (underneath theepicentre).
    The earthquake'sfocus was at exactly 37 degrees north, 18 degrees south, seventy five meters below the ground.
  8. (graphical user interface) The status of being the currently active element in auser interface, often indicated by a visual highlight.
    Text entered at the keyboard or pasted from a clipboard is sent to the component which currently has thefocus.
  9. (linguistics) The mostimportantword orphrase in a sentence or passage, or the one that impartsinformation.
  10. An object used in casting a magic spell.
    • 2004, Marian Singer, Trish MacGregor,The Only Wiccan Spell Book You'll Ever Need:
      Candles, in fact, are an essential ingredient in many spells. They can be used as either thefocus of the spell or as a component that sets the spell's overall mood and tone.
  11. (ichthyology) Thecentre of anolderfish'sscale, which is the point where ayounger fish's scale starts to grow from.
    Coordinate terms:annulus,circulus

Derived terms

[edit]

Translations

[edit]
in optics
in mathematics
fact of the convergence of light on the photographic medium
quality of the convergence of light on the photographic medium
concentration of attention
exact point of where an earthquake occursseehypocentre

Verb

[edit]

focus (third-person singular simple presentfocusesorfocusses,present participlefocusingorfocussing,simple past and past participlefocusedorfocussed)

  1. (transitive) To cause (rays oflight, etc) to converge at a single point.
    • 1961 February, “Talking of Trains: Collision at Newcastle”, inTrains Illustrated, pages75–76:
      The difficulties offocussing colour-light signals on curved tracks to ensure maximum sighting distance were underlined in the recent official report [...] on a low-speed collision at Newcastle Central on July 25, 1960, between an unfitted freight and a diesel-hauled passenger train.
  2. (transitive, optics) Toadjust (alens, an optical instrument) in order to position an image with respect to thefocal plane.
    You'll need tofocus the microscope carefully in order to capture the full detail of this surface.
  3. (intransitive, optics, of a lens, optical instrument, etc.) Toadjust itself or be adjusted such that light from a scene converges appropriately to create a clear image.
    I can't get the lens tofocus.
    The camerafocuses automatically on the subject's eyes.
  4. (transitive) To direct attention, effort, or energy to a particular audience or task.
    The presidentfocused her remarks on the newcomers.
  5. (intransitive) Toconcentrate one’sattention.
    If you're going to beat your competitors, you need tofocus.
  6. (intransitive, followed byon orupon) Toconcentrate one's attention on something; to have as one's central point of interest, concern, etc.
    I have tofocus on my work.
  7. (computing, graphical user interface, transitive) To transfer theinput focus to (a visual element), so that it receives subsequent input.
    The text box won't receive the user's keystrokes unless you explicitlyfocus it.
  8. (accounting, formerly) Toaggregate figures of accounts.
    • 1897,Bram Stoker,Dracula, published1993, page67:
      Whole pages of it are filled with masses of figures, generally single numbers added up in batches, and then the totals added in batches again, as though he were "focusing" some account, as the auditors put it.

Usage notes

[edit]

The spellings with -ss- are more common in Commonwealth English than in American English, but in both varieties they are less common than the spellingsfocuses,focusing,focused.

Derived terms

[edit]

Related terms

[edit]

Translations

[edit]
to cause (rays of light, etc) to converge at a single point
(transitive, optics) to adjust (a lens, an optical instrument)
(intransitive, optics) To adjust itself or be adjusted such that light from a scene converges appropriately
(transitive) To direct (attention, effort, or energy to)
(intransitive) to concentrate one's attention
(intransitive) to concentrate one's attention on something
(computing, graphical user interface) to transfer the input focus to

References

[edit]
  1. ^Mee, Nicholas (2014)Gravity: Cracking the Cosmic Code, Virtual Image Publishing,→ISBN, page74

Anagrams

[edit]

Catalan

[edit]

Etymology

[edit]

Borrowed fromLatinfocus. Compare the inherited doubletfoc.

Pronunciation

[edit]

Noun

[edit]

focus m (invariable)

  1. focus

Dutch

[edit]

Etymology

[edit]

Borrowed fromNew Latinfocus. The figurative sense probably derives fromEnglishfocus.[1]

Pronunciation

[edit]
  • IPA(key): /ˈfoː.kʏs/
  • Audio:(file)
  • Hyphenation:fo‧cus

Noun

[edit]

focus m (pluralfocussen)

  1. (optics, physics)focus
    Synonym:brandpunt
    Zij plaatste een convexe lens op defocus.
    She placed a convex lens on thefocus.
  2. (figurative)focus,centre
    Die jodocus heeft geenfocus.
    That clown doesn't have anyfocus.
  3. (linguistics)focus
    Focus is een belangrijk begrip in de informatiestructuur van zinnen.
    Focus is an important concept in the information structure of sentences.

Derived terms

[edit]

Related terms

[edit]

Descendants

[edit]

References

[edit]
  1. ^Philippa, Marlies,Debrabandere, Frans, Quak, Arend, Schoonheim, Tanneke,van der Sijs, Nicoline (2003–2009)Etymologisch woordenboek van het Nederlands (in Dutch), Amsterdam: Amsterdam University Press

Italian

[edit]

Etymology

[edit]

Borrowed fromLatinfocus, whence also Italianfuoco (an inherited doublet).

Pronunciation

[edit]

Noun

[edit]

focus m (invariable)

  1. focus (all senses)

Anagrams

[edit]

Latin

[edit]
 focus on Latin Wikipedia

Etymology

[edit]

Pronunciation

[edit]

Noun

[edit]

focus m (genitivefocī);second declension

  1. fireplace,hearth
  2. firepan,coalpan,brazier
  3. (figuratively)house,family
  4. (Late Latin)fire

Declension

[edit]

Second-declension noun, with locative.

singularplural
nominativefocusfocī
genitivefocīfocōrum
dativefocōfocīs
accusativefocumfocōs
ablativefocōfocīs
vocativefocefocī
locativefocīfocīs

Locative used in the sense "by the hearth".

Synonyms

[edit]

Derived terms

[edit]

Related terms

[edit]

Descendants

[edit]

Borrowings:

References

[edit]
  1. ^Matasović, Ranko (2010) “The etymology of Latin focus and the devoicing of final stops before *s in Proto-Indo-European”, inHistorische Sprachforschung / Historical Linguistics[1], volume123, Vandenhoeck & Ruprecht,→ISSN,→JSTOR, pages212–216

Further reading

[edit]
  • focus”, inCharlton T. Lewis and Charles Short (1879)A Latin Dictionary, Oxford: Clarendon Press
  • focus”, inCharlton T. Lewis (1891)An Elementary Latin Dictionary, New York: Harper & Brothers
  • "focus", in Charles du Fresne du Cange’sGlossarium Mediæ et Infimæ Latinitatis (augmented edition with additions by D. P. Carpenterius, Adelungius and others, edited by Léopold Favre, 1883–1887)
  • focus inGaffiot, Félix (1934)Dictionnaire illustré latin-français, Hachette.
  • Carl Meißner, Henry William Auden (1894)Latin Phrase-Book[2], London:Macmillan and Co.
    • to fight for hearth and home:pro ariset focis pugnare, certare, dimicare
  • focus”, inHarry Thurston Peck, editor (1898),Harper's Dictionary of Classical Antiquities, New York: Harper & Brothers
  • focus”, inWilliam Smith et al., editor (1890),A Dictionary of Greek and Roman Antiquities, London: William Wayte. G. E. Marindin
  • De Vaan, Michiel (2008)Etymological Dictionary of Latin and the other Italic Languages (Leiden Indo-European Etymological Dictionary Series; 7), Leiden, Boston: Brill,→ISBN,pages228-9

Romanian

[edit]

Etymology

[edit]

Borrowed fromFrenchfocus orGermanFokus.

Noun

[edit]

focus n (pluralfocusuri)

  1. focus

Declension

[edit]
Declension offocus
singularplural
indefinitedefiniteindefinitedefinite
nominative-accusativefocusfocusulfocusurifocusurile
genitive-dativefocusfocusuluifocusurifocusurilor
vocativefocusulefocusurilor
Retrieved from "https://en.wiktionary.org/w/index.php?title=focus&oldid=83944242"
Categories:
Hidden categories:

[8]ページ先頭

©2009-2025 Movatter.jp