Complete Definition of "focus"

English
wikipedia
Etymology
L. focus#Latin|focus (hearth, fireplace), of unknown origin.

Noun
en-noun|foc|i | - | pl2=focuses

  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.

  1. countable geometry a point of a conic at which rays reflected from a curve or surface converge.
  2. uncountable (photography, cinematography) The fact of the convergence of light on the photographic medium.

#:Unfortunately, the license plate is out of focus in this image.

  1. 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.

  1. uncountable concentration of attention.

#: I believe I can bring the high degree of focus required for this important job.

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

#: The earthquake's focus was at exactly 37 degrees north, 18 degrees south, seventy five meters below the ground.

Translations
trans-top|in optics
Czech: ohnisko n
Danish: fokus n
Dutch: focus m, brandpunt n
Finnish: fokus, polttopiste
trans-mid
German: Brennpunkt m, Fokus m
Russian: фокус (fókus) m, фокальная точка (fokál’naja tóčka) f
Polish: ognisko
trans-bottom

trans-top|in mathematics
Danish: fokus n
Dutch: focus m, brandpunt n
Finnish: polttopiste, leikkauspiste
trans-mid
French: foyer#French|foyer m
German: Brennpunkt m
Russian фокус (fókus) m, фокальная точка (fokál’naja tóčka) f
trans-bottom

trans-top|fact of the convergence of light on the photographic medium
Danish: fokus n
Dutch: brandpunt n
German: Fokus m
trans-mid
trans-bottom

trans-top|quality of the convergence of light on the photographic medium
Danish: fokus n
Dutch: brandpunt n
German: Fokus m
trans-mid
Russian: наводка на резкость (navódka na rézkost’) f
trans-bottom

trans-top|concentration of attention
Chinese:
:Mandarin: zh-ts|焦點|焦点 (jiāodiǎn)
Danish: fokus n
Dutch: focus m
Finnish: keskittyminen
trans-mid
French: attention#French|attention f
German: Konzentration f
Russian: концентрация (внимание|внимания) (kontsentrátsija (vnimánija)) f
trans-bottom

Verb
en-verb|focuses or, less commonly, focusses|focusing or, less commonly, focussing|focused or, less commonly, focussed

  1. transitive To cause (rays of light, etc) to converge at a single point.
  2. 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.

  1. transitive (followed by on or upon) To concentrate one's attention.

#:Focus on passing the test.

  1. transitive To make (a liquid) less diluted.
  2. intransitive To concentrate one’s attention.

#:If you're going to beat your competitors, you need to focus.

Derived terms
focus group
in focus
out of focus

Related terms
focal

Translations
trans-top|cause (rays of light, etc) to converge at a single point
French: focaliser
trans-mid
trans-bottom

trans-top|to adjust (a lens, an optical instrument)
Danish: fokusere
Finnish: tarkentaa
German: fokussieren
trans-mid
Russian: фокусировать (fokusírovat’), наводить на фокус (navodít’ na fókus)
trans-bottom

to concentrate one's attention (transitive)

Danish: fokusere på, koncentrere sig om
French: se concentrer (on/upon: sur#French|sur)
German: sich konzentrieren (on/upon: auf)
mid
Italian: concentrarsi (on/upon: su#Italian|su)
Russian: сосредоточивать (sosredotóčivat’), концентрировать (kontsentrírovat’)

trans-top|make (a liquid) less diluted
trans-mid
Russian: концентрировать (kontsentrírovat’)
trans-bottom

to concentrate one's attention (intransitive)
<!--NOTE: this is the INTRANSITIVE sense of the verb, as in "I can't concentrate"-->

Danish: fokusere, koncentrere sig
French: se concentrer, se focaliser
Finnish: keskittyä, keskittää/kohdistaa huomionsa
German: sich konzentrieren
mid
Italian: concentrarsi
Russian: сосредоточиваться (sosredotóčivat’sja), концентрироваться (kontsentrírovat’sja)

Category:English nouns with irregular plurals


Latin

Noun
focus, Wiktionary Appendix:Latin second declension|focī m (Diminutive: foculus)

  1. hearth, fireplace

Declension
Second declension (2).
{| cellpadding"5" border"1"
!style="background:#F1BC4E;"| Case \ #
!style="background:#C0C0C0;"| M.
!style="background:#C0C0C0;"| MM.
|-
!style="background:#C0C0C0;"| Nominative
|style="background:#F5F5F5;"| <big> focus
|style="background:#F5F5F5;"| <big> focī
|-
!style="background:#C0C0C0;"| Genitive
|style="background:#F5F5F5;"| <big> focī
|style="background:#F5F5F5;"| <big> focōrum
|-
!style="background:#C0C0C0;"| Dative
|style="background:#F5F5F5;"| <big> focō
|style="background:#F5F5F5;"| <big> focīs
|-
!style="background:#C0C0C0;"| Accusative
|style="background:#F5F5F5;"| <big> focum
|style="background:#F5F5F5;"| <big> focōs
|-
!style="background:#C0C0C0;"| Ablative
|style="background:#F5F5F5;"| <big> focō
|style="background:#F5F5F5;"| <big> focīs
|}

Related terms
focacius
focarius
focillare
foculare

Descendants
French: feu
Italian: fuoco

Category:Latin nouns

ar:focus
et:focus
fr:focus
ko:focus
io:focus
ru:focus
simple:focus
ta:focus
te:focus
vi:focus
tr:focus
zh:focus

Revision and Credits for"focus"
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