Focus

the concentration of attention or energy on something

maximum clarity or distinctness of an image rendered by an optical system

maximum clarity or distinctness of an idea

a central point or locus of an infection in an organism

special emphasis attached to something

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

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

direct one's attention on something

cause to converge on or toward a central point

bring into focus or alignment

become focussed or come into focus

put (an image) into focus