Focus is something that camera lenses and sleepy students are always being asked to do. For cameras, it means finding a point where the subject is clear or "in focus." For students, it means paying attention.
Focus is all about finding a center — of a parabolic curve, of a lens, of a meditative state. In Latin, focus meant 'domestic hearth,' which just goes to show that not much has changed — since kitchens remain the focus of the modern home. Focus can be used as a verb, as in "I need to focus on my work, so I can play video games later;" and as a noun, as in "What is the focus of this essay? I can't tell, since the writer seems to be all over the place."
1 |
nv |
the concentration of attention or energy on something
direct one's attention on something
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2 |
nv |
maximum clarity or distinctness of an image rendered by an optical system
put (an image) into focus
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3 |
nv |
a point of convergence of light (or other radiation) or a point from which it diverges
cause to converge on or toward a central point
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4 |
n |
a fixed reference point on the concave side of a conic section
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