A center of interest or activity. See Synonyms at center.
from The American Heritage Dictionary of the English Language, 4th Edition
A point at which rays of light or other radiation converge or from which they appear to diverge, as after refraction or reflection in an optical system: the focus of a lens. Also called focal point.
from The American Heritage Dictionary of the English Language, 4th Edition
An apparatus used to adjust the focal length of an optical system in order to make an image distinct or clear: a camera with automatic focus.
from The American Heritage Dictionary of the English Language, 4th Edition
Geology The point of origin of an earthquake.
from The American Heritage Dictionary of the English Language, 4th Edition
Mathematics A fixed point whose relationship with a directrix determines a conic section.
from The American Heritage Dictionary of the English Language, 4th Edition
verb-transitive
To adjust (a lens, for example) to produce a clear image.
from The American Heritage Dictionary of the English Language, 4th Edition
To cause (light rays, for example) to converge on or toward a central point; concentrate.
from The American Heritage Dictionary of the English Language, 4th Edition
To direct toward a particular point or purpose: focused all their attention on finding a solution to the problem.
from The American Heritage Dictionary of the English Language, 4th Edition
verb-intransitive
To concentrate attention or energy: a campaign that focused on economic issues.
from The American Heritage Dictionary of the English Language, 4th Edition
To converge on or toward a central point of focus; be focused.
from The American Heritage Dictionary of the English Language, 4th Edition
verb
Pay particular attention to:.
from Free Scrabble Dictionary
Adapt to the prevailing level of light and become able to see clearly:.
from Free Scrabble Dictionary
To bring into focus.
from Free Scrabble Dictionary
To adjust the focus of (as the eye or a lens).
from Free Scrabble Dictionary
To cause to be concentrated.
from Free Scrabble Dictionary
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