the centre of interest or activity
an act of concentrating interest or activity on something
the point of origin of an earthquake.
the principal site of an infection or other disease.
the state or quality of having or producing clear visual definition
another term for focal point
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.
a device on a lens which can be adjusted to produce a clear image.
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.
an element of a sentence that is given prominence by intonational or other means.
adapt to the prevailing level of light and become able to see clearly
cause (one’s eyes) to focus
adjust the focus of (a telescope, camera, or other instrument)
(of rays or waves) meet at a single point.
(of a lens) make (rays or waves) meet at a single point.
(of light, radio waves, or other energy) become concentrated into a sharp beam.
(of a lens) concentrate (light, radio waves, or energy) into a sharp beam.
pay particular attention to
concentrate
place the focus on (an element of a sentence).
