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The center of interest or activity; a point of concentration
The camera's focus was sharp and clear.
The camera captured a clear and precise image.
Can refer to both physical and mental concentration.
To concentrate one's attention or effort on a particular task or subject
He focused on solving the problem step by step.
He concentrated on solving the problem methodically.
Often used with 'on' to specify the object of focus.
When using 'focus' as a verb, remember to include 'on' to specify what you are concentrating on.
Always use 'on' after 'focus' when specifying the object of concentration.
From Latin 'focare', meaning 'to hearth, fire', related to 'focus' as the center of heat or light.
Can be used as both a noun and a verb. As a verb, it often takes the preposition 'on' to specify the object of focus.