1. third-person singular present tense of focus; to concentrate attention or effort on something
Usage: British spelling variant
2. third-person singular present tense of focus; to adjust something to produce a clear image
Usage: British spelling variant; photography; optics

Examples

• She focusses on her studies every evening.
• The teacher focusses the class’s attention on the main problem.
• He focusses the camera lens before taking the photograph.
• The company focusses its efforts on customer satisfaction.
• The microscope focusses light to magnify small objects.
• During meditation, she focusses on her breathing.