EnglishEdit

 
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EtymologyEdit

Borrowed from Latin focus (hearth, fireplace); see there for more.

PronunciationEdit

  • (UK) IPA(key): /ˈfəʊ.kəs/
    • (file)
  • (US) IPA(key): /ˈfoʊ.kəs/
  • Rhymes: -əʊkəs

NounEdit

focus (countable and uncountable, plural foci or focuses or focusses)

  1. (countable, optics) A point at which reflected or refracted rays of light converge.
    The heat of sunlight at the focus of a magnifying glass can easily set dry leaves on fire.
  2. (countable, geometry) A point of a conic at which rays reflected from a curve or surface converge.
  3. (uncountable, photography, cinematography) The fact of the convergence of light on the photographic medium.
    • 2013 July-August, Catherine Clabby, “Focus on Everything”, in American Scientist:
      Not long ago, it was difficult to produce photographs of tiny creatures with every part in focus. [] A photo processing technique called focus 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 full focus on a micron scale.
    Unfortunately, the license plate is out of focus in this image.
  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 soft focus into sharp focus.
  5. (uncountable) Concentration of attention.
    I believe I can bring the high degree of focus required for this important job.
  6. (countable, seismology) The exact point of where an earthquake occurs, in three dimensions (underneath the epicentre).
    The earthquake's focus was at exactly 37 degrees north, 18 degrees south, seventy five meters below the ground.
  7. (graphical user interface) The indicator of the currently active element in a user interface.
    Text entered at the keyboard or pasted from a clipboard is sent to the component which currently has the focus.
  8. (linguistics) The most important word or phrase in a sentence or passage, or the one that imparts information.
  9. 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 the focus of the spell or as a component that sets the spell's overall mood and tone.
    • 2014, Kristen S. Walker, Witch Gate (page 180)
      I ran through what I knew about spells from Mom and other witchcraft sources, but nothing matched what I was used to seeing in her magic work. Usually she used herbs and other plants as a focus for the spell.

Derived termsEdit

TranslationsEdit

VerbEdit

focus (third-person singular simple present focuses or focusses, present participle focusing or focussing, simple past and past participle focused or focussed)

  1. (intransitive, followed by on or upon) To concentrate during a task.
    I have to focus on my work.
  2. (transitive) To direct attention, effort, or energy to a particular audience or task.
    The president focused her remarks to the newcomers.
  3. (transitive) To cause (rays of light, etc) to converge at a single point.
    • 1961 February, “Talking of Trains: Collision at Newcastle”, in Trains Illustrated, pages 75-76:
      The difficulties of focussing 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.
  4. (transitive) To adjust (a lens, an optical instrument) in order to position an image with respect to the focal plane.
    You'll need to focus the microscope carefully in order to capture the full detail of this surface.
  5. (intransitive) To concentrate one’s attention.
    If you're going to beat your competitors, you need to focus.
  6. (computing, graphical user interface, transitive) To transfer the input focus to (a visual element), so that it receives subsequent input.
    The text box won't receive the user's keystrokes unless you explicitly focus it.

Usage notesEdit

The spellings focusses, focussing, focussed are more common in Commonwealth English than in American English, but in both varieties they are less common than the spellings focuses, focusing, focused.

Derived termsEdit

Related termsEdit

TranslationsEdit

AnagramsEdit


CatalanEdit

EtymologyEdit

Borrowed from Latin focus. Compare the inherited doublet foc.

PronunciationEdit

NounEdit

focus m (plural focus)

  1. focus

DutchEdit

EtymologyEdit

Borrowed from New Latin focus. The figurative sense probably derives from English focus.[1]

PronunciationEdit

  • IPA(key): /ˈfoː.kʏs/
  • (file)
  • Hyphenation: fo‧cus

NounEdit

focus m (plural focussen)

  1. (optics, physics) focus
    Zij plaatste een convexe lens op de focus.
    She placed a convex lense on the focus.
    Synonym: brandpunt
  2. (figuratively) focus, centre
    Die jodocus heeft geen focus.
    That clown doesn't have any focus.
  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 termsEdit

Related termsEdit

DescendantsEdit

  • Afrikaans: fokus

ReferencesEdit

  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

ItalianEdit

EtymologyEdit

Borrowed from Latin focus, whence also Italian fuoco (an inherited doublet).

PronunciationEdit

  • IPA(key): /ˈfɔ.kus/
  • Hyphenation: fò‧cus

NounEdit

focus m (invariable)

  1. focus (all senses)

AnagramsEdit


LatinEdit

 focus on Latin Wikipedia

EtymologyEdit

"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." (Gravity, 2014, p. 74)

PronunciationEdit

NounEdit

focus m (genitive focī); second declension

  1. fireplace, hearth
  2. firepan, coal pan, brazier
  3. (figuratively) house, family
  4. (Vulgar Latin) fire

DeclensionEdit

Second-declension noun.

Case Singular Plural
Nominative focus focī
Genitive focī focōrum
Dative focō focīs
Accusative focum focōs
Ablative focō focīs
Vocative foce focī

Derived termsEdit

Related termsEdit

SynonymsEdit

DescendantsEdit

ReferencesEdit

  • focus in Charlton T. Lewis and Charles Short (1879) A Latin Dictionary, Oxford: Clarendon Press
  • focus in Charlton T. Lewis (1891) An Elementary Latin Dictionary, New York: Harper & Brothers
  • focus in Charles du Fresne du Cange’s Glossarium Mediæ et Infimæ Latinitatis (augmented edition with additions by D. P. Carpenterius, Adelungius and others, edited by Léopold Favre, 1883–1887)
  • focus in Gaffiot, Félix (1934) Dictionnaire illustré Latin-Français, Hachette
  • Carl Meißner; Henry William Auden (1894) Latin Phrase-Book[1], London: Macmillan and Co.
    • to fight for hearth and home: pro aris et focis pugnare, certare, dimicare
  • focus in Harry Thurston Peck, editor (1898) Harper's Dictionary of Classical Antiquities, New York: Harper & Brothers
  • focus in William Smith et al., editor (1890) A Dictionary of Greek and Roman Antiquities, London: William Wayte. G. E. Marindin