focus

/ˈfoʊ·kəs/ n [C/U] (plural focuses or foci /ˈfoʊ·sɑɪ/, /-kɑɪ/) (POSITION)

Definition

› physics the exact place or position where beams of light, heat, or sound meet after moving toward each other; focal point › earth science 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.

(Definition of focus n (POSITION) from the Cambridge Academic Content Dictionary © Cambridge University Press)