|Noun||1.||focus - the concentration of attention or energy on something; "the focus of activity shifted to molecular biology"; "he had no direction in his life"|
|2.||focus - maximum clarity or distinctness of an image rendered by an optical system; "in focus"; "out of focus"|
|3.||focus - maximum clarity or distinctness of an idea; "the controversy brought clearly into focus an important difference of opinion"|
|4.||focus - a central point or locus of an infection in an organism; "the focus of infection"|
|5.||focus - special emphasis attached to something; "the stress was more on accuracy than on speed"|
|6.||focus - a point of convergence of light (or other radiation) or a point from which it diverges|
|7.||focus - a fixed reference point on the concave side of a conic section|
|Verb||1.||focus - direct one's attention on something; "Please focus on your studies and not on your hobbies"|
|2.||focus - cause to converge on or toward a central point; "Focus the light on this image"|Antonyms: blur
- to make less distinct or clear; "The haze blurs the hills"
|3.||focus - bring into focus or alignment; to converge or cause to converge; of ideas or emotions|
|4.||focus - become focussed or come into focus; "The light focused"|Antonyms: slur
- become vague or indistinct; "The distinction between the two theories blurred"
|5.||focus - put (an image) into focus; "Please focus the image; we cannot enjoy the movie"|Antonyms: blear
- make dim or indistinct; "The drug blurs my vision"