focus

/ˈfəʊ.kəs/ · noun

Meaning

A point at which reflected or refracted rays of light converge.
A point of a conic at which rays reflected from a curve or surface converge.
The fact of the convergence of light on the photographic medium.
The quality of the convergence of light on the photographic medium.
Concentration of attention.
The exact point of where an earthquake occurs, in three dimensions (underneath the epicentre).
(followed by on or upon) To concentrate one's attention.
To cause (rays of light, etc) to converge at a single point.
To adjust (a lens, an optical instrument) in order to position an image with respect to the focal plane.
To concentrate one’s attention.
To transfer the input focus to (a visual element), so that it receives subsequent input.

No prose etymology has been added yet.

No ancestor words have been linked yet.

No descendant words have been linked yet.