1.Definition: a central point or locus of an infection in an organism

"The focus of infection"

Related Noun(s):nidus

Category: General

2.Definition: a fixed reference point on the concave side of a conic section

Category: Places

3.Definition: a point of convergence of light (or other radiation) or a point from which it diverges

Category: General

4.Definition: maximum clarity or distinctness of an idea

"The controversy brought clearly into focus an important difference of opinion"

Category: General

5.Definition: maximum clarity or distinctness of an image rendered by an optical system

"In focus", "Out of focus"

Category: General

6.Definition: special emphasis attached to something

Related Noun(s):stress

Category: General

7.Definition: the concentration of attention or energy on something

"The focus of activity shifted to molecular biology", "He had no direction in his life"

Related Noun(s):direction

Category: General