Cambridge Learner's Dictionary
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Definition
focus1 Show phoneticsverb focusing, past focused
1 CAMERA [T] If you focus a camera or something else that you look through, you make small changes to it until you can see something clearly.
2 EYES [I,T] If you focus your eyes, or your eyes focus, they change so that you can see clearly.
Give your eyes time to focus in the darkness.
