- (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.
- (countable, geometry) A point of a conic at which rays reflected from a curve or surface converge.
- (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.
- (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.
- (uncountable) Concentration of attention.
- I believe I can bring the high degree of focus required for this important job.
- (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.
- (computing, 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.
- (linguistics) The most important word or phrase in a sentence or passage, or the one that imparts information.
- French: foyer
- German: Brennpunkt, Fokus
- Italian: fuoco
- Portuguese: foco
- Russian: фо́кус
- Spanish: foco, punto focal
focus (focuses, present participle focusing; past and past participle focused)
- (transitive) 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.
- You'll need to focus the microscope carefully in order to capture the full detail of this surface.
- (transitive, followed by on or upon) To concentrate one's attention.
- Focus on passing the test.
- (intransitive) To concentrate one’s attention.
- If you're going to beat your competitors, you need to focus.
- (computing, GUI, 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.
- French: mettre au point
- German: fokussieren
- Portuguese: focalizar
- Russian: фокуси́ровать
- Spanish: enfocar
- French: se concentrer (on/upon: sur)
- German: sich konzentrieren (on/upon: auf), fokussieren
- Italian: concentrarsi (on/upon: su)
- Portuguese: focar
- Russian: концентри́ровать
- Spanish: centrar, enfocar
- French: concentrer
- Russian: концентри́ровать
- French: se concentrer, se focaliser
- German: sich konzentrieren
- Italian: concentrarsi
- Portuguese: focar-se
- Russian: концентри́роваться
- Spanish: concentrarse