focus Definition in Cambridge American English Dictionary
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Definition of "focus" - American English Dictionary

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focusnoun

 us   /ˈfoʊ·kəs/ (plural focuses or foci  /ˈfoʊ·sɑɪ, -kɑɪ/ )

focus noun (MAIN OBJECT)

[C] (also focal point) the main object or interest, or the attention given something: The focus of attention has shifted from the economy to improving the public schools. State officials urge continued focus on mosquito control.

focus noun (POSITION)

physics [C/U] the exact place or position where beams of light, heat, or sound meet after moving toward each other; focal point earth science [C/U] A focus is also the exact position inside the earth where an earthquake begins.in focus (also out of focus) A photograph or an image seen through a device with a lens , such as a microscope , telescope , or camera, that is in focus is clear and one that is out of focus is not clear.

focusverb [I/T]

 us   /ˈfoʊ·kəs/

focus verb [I/T] (DIRECT ATTENTION)

to direct attention toward something or someone: [I] Tonight’s program focuses on homelessness.

focus verb [I/T] (ADJUST)

to adjust something in order to see more clearly: [T] I focused the binoculars on the bird on a branch of the tree.
(Definition of focus from the Cambridge Academic Content Dictionary © Cambridge University Press)
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