Focus

• noun: maximum clarity or distinctness of an image rendered by an optical system (Example: "In focus")
• noun: maximum clarity or distinctness of an idea (Example: "The controversy brought clearly into focus an important difference of opinion")
• noun: the concentration of attention or energy on something (Example: "The focus of activity shifted to molecular biology")
• noun: a fixed reference point on the concave side of a conic section
• noun: a point of convergence of light (or other radiation) or a point from which it diverges
• noun: a central point or locus of an infection in an organism (Example: "The focus of infection")
• noun: special emphasis attached to something
  
• verb: cause to converge on or toward a central point (Example: "Focus the light on this image")
• verb: put (an image) into focus (Example: "Please focus the image")
• verb: become focussed or come into focus (Example: "The light focused")
• verb: direct one's attention on something (Example: "Please focus on your studies and not on your hobbies")
• verb: bring into focus or alignment; to converge or cause to converge; of ideas or emotions