|noun|
1.a point at which rays (as of light, heat, or sound) meet after being reflected or bent : the point at which an image is formed
2.the distance from a lens or mirror to a focus
3.an adjustment that gives clear vision
He turned his head almost upside down to get a more acute focus on her …— Jean Craighead George, Julie of the Wolves
4.a center of activity or interest
Fractions are the focus of this lesson.
5.a point at which rays (as of light, heat, or sound) converge or from which they diverge or appear to diverge
6.a point of convergence of a beam of particles (as electrons)
7.focal length
8.adjustment for distinct vision
9.a localized area of disease or the chief site of a generalized disease or infection
|verb|
1.to bring (as light rays) to a focus
2.to adjust the focus of (as the eye or a lens)
3.to bring (as an image) into focus
4.to come to a focus
5.to bring or come to a focus
focus rays of light
6.to adjust the focus of
He focused his binoculars.
7.to direct or cause to direct at
Focus your attention here.
8.to cause to be concentrated
focused their attention on the most urgent problems
9.to adjust the focus of (the eye, a lens, etc.)
focus the telescope
10.to bring into focus
The results of that research were focused for classroom presentation.
11.to bring (something, such as light rays) to a focus : concentrate
12.to concentrate attention or effort
focus on the most pressing needs
13.to adjust one’s eye or a camera to a particular range
Newborn babies cannot focus for several months.
14.to come to a focus : converge
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