focus

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1 focus /ˈfoʊkəs/ noun
plural foci /ˈfoʊˌsaɪ/ also focuses
1 focus
/ˈfoʊkəs/
noun
plural foci /ˈfoʊˌsaɪ/ also focuses
Learner's definition of FOCUS
[count] : a subject that is being discussed or studied : the subject on which people's attention is focused usually singular
: a main purpose or interest
[noncount]
[singular]
[count] technical : a point at which rays of light, heat, or sound meet or from which they move apart or appear to move apart
especially : the point at which an image is formed by a mirror, a lens, etc.
[noncount]
: a state in which something (such as a camera, a telescope, or a person's eyes) produces a clear picture or image
: a state in which the small details of a picture or image can be clearly seen
see also soft focus
: a state or condition in which something can be clearly understood
2 focus /ˈfoʊkəs/ verb
focuses also focusses; focused also focussed; focusing also focussing
2 focus
/ˈfoʊkəs/
verb
focuses also focusses; focused also focussed; focusing also focussing
Learner's definition of FOCUS
[+ object] : to cause (something, such as attention) to be directed at something specific + on
[no object] : to direct your attention or effort at something specific
often + on
: to adjust (something, such as a lens or a camera) to make an image clear
[+ object]
[no object]
◊ If you focus your eyes on something or if your eyes focus on something, you look at that thing so that you can see it clearly.
technical : to cause (light) to come together at a point
[+ object]
[no object]
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