Focusnoun
A point at which reflected or refracted rays of light converge.
Focusnoun
A point of a conic at which rays reflected from a curve or surface converge.
Focusnoun
The fact of the convergence of light on the photographic medium.
Focusnoun
The quality of the convergence of light on the photographic medium.
Focusnoun
(uncountable) Concentration of attention.
Focusnoun
The exact point of where an earthquake occurs, in three dimensions (underneath the epicentre).
Focusnoun
The indicator of the currently active element in a user interface.
Focusnoun
(linguistics) The most important word or phrase in a sentence or passage, or the one that imparts information.
Focusverb
(transitive) To cause (rays of light, etc) to converge at a single point.
Focusverb
(transitive) To adjust (a lens, an optical instrument) in order to position an image with respect to the focal plane.
Focusverb
To concentrate one's attention.
Focusverb
(intransitive) To concentrate one’s attention.
Focusverb
To transfer the input focus to (a visual element), so that it receives subsequent input.
Focusnoun
A point in which the rays of light meet, after being reflected or refracted, and at which the image is formed; as, the focus of a lens or mirror.
Focusnoun
A point so related to a conic section and certain straight line called the directrix that the ratio of the distance between any point of the curve and the focus to the distance of the same point from the directrix is constant.
Focusnoun
A central point; a point of concentration.
Focusverb
To bring to a focus; to focalize; as, to focus a camera.
Focusnoun
the concentration of attention or energy on something;
Focusnoun
maximum clarity or distinctness of an image rendered by an optical system;
Focusnoun
maximum clarity or distinctness of an idea;
Focusnoun
a central point or locus of an infection in an organism;
Focusnoun
special emphasis attached to something;
Focusnoun
a point of convergence of light (or other radiation) or a point from which it diverges
Focusnoun
a fixed reference point on the concave side of a conic section
Focusverb
direct one's attention on something;
Focusverb
cause to converge on or toward a central point;
Focusverb
bring into focus or alignment; to converge or cause to converge; of ideas or emotions
Focusverb
become focussed or come into focus;
Focusverb
put (an image) into focus;
Focusnoun
the centre of interest or activity
Focusnoun
an act of concentrating interest or activity on something
Focusnoun
the point of origin of an earthquake.
Focusnoun
the principal site of an infection or other disease.
Focusnoun
the state or quality of having or producing clear visual definition
Focusnoun
another term for focal point
Focusnoun
the point at which an object must be situated with respect to a lens or mirror for an image of it to be well defined.
Focusnoun
a device on a lens which can be adjusted to produce a clear image.
Focusnoun
one of the fixed points from which the distances to any point of a given curve, such as an ellipse or parabola, are connected by a linear relation.
Focusnoun
an element of a sentence that is given prominence by intonational or other means.
Focusverb
adapt to the prevailing level of light and become able to see clearly
Focusverb
cause (one's eyes) to focus
Focusverb
adjust the focus of (a telescope, camera, or other instrument)
Focusverb
(of rays or waves) meet at a single point.
Focusverb
(of a lens) make (rays or waves) meet at a single point.
Focusverb
(of light, radio waves, or other energy) become concentrated into a sharp beam.
Focusverb
(of a lens) concentrate (light, radio waves, or energy) into a sharp beam.
Focusverb
pay particular attention to
Focusverb
concentrate
Focusverb
place the focus on (an element of a sentence).
Concentrationnoun
The act, process or ability of concentrating; the process of becoming concentrated, or the state of being concentrated.
Concentrationnoun
The direction of attention to a specific object.
Concentrationnoun
The act, process or product of reducing the volume of a liquid, as by evaporation.
Concentrationnoun
The act or process of removing the dress of ore and of reducing the valuable part to smaller compass, as by currents of air or water.
Concentrationnoun
A field or course of study on which one focuses, especially as a student in a college or university.
Concentrationnoun
The proportion of a substance in a whole.
Concentrationnoun
(chemistry) The amount of solute in a solution measured in suitable units (e.g., parts per million (ppm))
Concentrationnoun
The matching game pelmanism.
Concentrationnoun
The act or process of concentrating; the process of becoming concentrated, or the state of being concentrated; concentration.
Concentrationnoun
The act or process of reducing the volume of a liquid, as by evaporation.
Concentrationnoun
The act or process of removing the dress of ore and of reducing the valuable part to smaller compass, as by currents of air or water.
Concentrationnoun
the strength of a solution; number of molecules of a substance in a given volume (expressed as moles/cubic meter)
Concentrationnoun
the spatial property of being crowded together
Concentrationnoun
strengthening the concentration (as of a solute in a mixture) by removing extraneous material
Concentrationnoun
increase in density
Concentrationnoun
complete attention; intense mental effort
Concentrationnoun
bringing together military forces
Concentrationnoun
great and constant diligence and attention
Concentrationnoun
the action or power of focusing all one's attention
Concentrationnoun
dealing with one particular thing above all others
Concentrationnoun
a close gathering of people or things
Concentrationnoun
the action of gathering together closely
Concentrationnoun
the relative amount of a particular substance contained within a solution or mixture or in a particular volume of space
Concentrationnoun
the action of strengthening a solution by the removal or reduction of the diluting agent or by the selective accumulation of atoms or molecules
Concentration
In chemistry, concentration is the abundance of a constituent divided by the total volume of a mixture. Several types of mathematical description can be distinguished: mass concentration, molar concentration, number concentration, and volume concentration.