1. to cause people to divide into two opposing groups with different opinions
Usage: British spelling
2. to cause light waves to vibrate in a single plane
Usage: physics; British spelling
3. to give magnetic or electrical polarity to something
Usage: physics; British spelling

Examples

• The controversial policy polarises public opinion.
• This issue polarises voters along party lines.
• The debate polarises the community into two camps.
• Sunglasses use lenses that polarise light to reduce glare.
• The filter polarises the light beam for the experiment.
• The magnet polarises the metal particles.
• The electric field polarises the molecules in the material.