All 4 Uses

focus
in
Harry Potter (#3) and the Prisoner of Azkaban
(Auto-generated)

One look told them that Hagrid had been drinking a lot; there was a pewter tankard almost as big as a bucket in front of him, and he seemed to be having difficulty getting them into focus.
Chpt 6 *

focus = view (a state where something can be seen clearly)
We must keep our focus!
Chpt 9 *

focus = concentration
A blur of colors and shapes rushed past him, his ears were pounding, he tried to yell but couldn't hear his own voice —And then he felt solid ground beneath his feet, and everything came into focus again — He was standing next to Hermione in the deserted entrance hall and a stream of golden sunlight was falling across the paved floor from the open front doors.
Chpt 21

focus = view (a state where something can be seen clearly)
Professor Trelawney had gone rigid in her armchair; her eyes were unfocused and her mouth sagging.†
Chpt 16

unfocused = not good at concentrating on one thing

standard prefix: The prefix "un-" in unfocused means not and reverses the meaning of focused. This is the same pattern you see in words like unhappy, unknown, and unlucky.

Definitions:

(1) (focus as in: Turn your focus to question #2.)
to direct attention or effort toward a single thing; or the ability to do so without getting distracted
(2) (focus as in: The focus of our study is...)
where attention is concentrated or directed
(3) (focus as in: bring into focus; or out of focus)
a state where something has come into view or can be seen clearly; or an adjustment made to permit a clear view
(4) (focus as with technical usage)
technical usage typically involves some sense of center or concentration such as:
- physics — a point where things come together such as the point where light rays meet
- geometry — a fixed reference point (as of a parabola)
- geology — the point of origin of an earthquake
See a comprehensive dictionary for other less common meanings.
(5) (meaning too rare to warrant focus)