All 5 Uses

focus
in
Unbroken - adapted for young adults
(Edited)

Focused on the 1940 Tokyo Olympics, he smashed record after record.
p. 41.4

focused = concentrated, look at, or paid attention to
Louie kept his focus below, trying to aim for the parked planes.
p. 79.4 *

focus = concentration
This was the focus of her nightmares: Louie being shot in his plane.
p. 162.2 *

focus = where attention is concentrated
With the escape off, they focused on insurgency.
p. 168.9

focused = concentrated, look at, or paid attention to
But the Zamperinis focused on one sentence: Keep my guns in good condition.
p. 188.9

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)