1. the center of interest or activity
2. concentrated attention or effort
3. the point where light rays meet after being reflected or refracted
Usage: optics

1. to concentrate attention or effort on something
2. to adjust something to produce a clear image

Examples

• The focus of the meeting was budget planning.
• She lost her focus during the exam.
• The camera lens brings distant objects into focus.
• Please focus on your homework.
• He focused the telescope on the moon.
• The company needs to focus its efforts on customer service.
• The microscope was out of focus.
• Try to focus your attention on the speaker.