n. maximum clarity or distinctness of an image rendered by an optical system; "in focus"; "out of focus"

n. maximum clarity or distinctness of an idea; "the controversy brought clearly into focus an important difference of opinion"

n. the concentration of attention or energy on something; "the focus of activity shifted to molecular biology"; "he had no direction in his life"

n. a fixed reference point on the concave side of a conic section

n. a point of convergence of light (or other radiation) or a point from which it diverges

n. special emphasis attached to something; "the stress was more on accuracy than on speed"

n. a kind of programming language

v. become focussed or come into focus; "The light focused"

v. direct one's attention on something; "Please focus on your studies and not on your hobbies"

v. bring into focus or alignment; to converge or cause to converge; of ideas or emotions