Focus

Noun

 * 1)  a point at which reflected or refracted rays of light converge.
 * 2)  a point of a conic at which rays reflected from a curve or surface converge.
 * 3)  The fact of the convergence of light on the photographic medium.
 * 4)  The quality of the convergence of light on the photographic medium.
 * 5)  concentration of attention.
 * 6)  the exact point of where an earthquake occurs, in three dimensions.
 * 7)  The indicator of the currently active element in a user interface.
 * 8)  The most important word or phrase in a sentence or passage, or the one that imparts information

Verb

 * 1)  To cause (rays of light, etc) to converge at a single point.
 * 2)  To adjust (a lens, an optical instrument) in order to position an image with respect to the focal plane.
 * You'll need to focus the microscope carefully in order to capture the full detail of this surface.
 * 1)  To concentrate one's attention.
 * Focus on passing the test.
 * 1)  To make (a liquid) less diluted.
 * 2)  To concentrate one’s attention.

Adjectives for Focus
constant; sharp; blurred; careful; precise; accurate.

Adverbs for Focus
sharply; precisely; accurately; deftly; skillfully; blurredly; scientifically; exactly.

Thesaurus
adductor, approach, asymptote, attractant, attrahent, axiom, blurred, blurry, bottleneck, bring into focus, center, center of attraction, center of consciousness, center of interest, clear, collision course, concenter, concentralization, concentralize, concentrate, concentration, concourse, concurrence, confluence, conflux, congress, converge, convergence, converging, core, crossing, cynosure, distinct, elixir, essence, essential, fix, fixate, flower, focal point, focalization, focalize, focus of attention, fundamental, funnel, fuzzy, gist, gravamen, heart, hub, hypostasis, in focus, indistinct, inner essence, kernel, lodestar, lure, magnet, marrow, meat, meet, meeting, mutual approach, narrowing gap, nave, nerve, nub, nucleus, nuts and bolts, out of focus, pinpoint, pith, point of convergence, polestar, postulate, prime focus, principle, put, quid, quiddity, quintessence, radius, rivet, sap, soul, spirit, spokes, spotlight, stuff, substance, tangent, target, the nitty-gritty, unclear, woolly, zero in