1. divided into two sharply contrasting groups or sets of opinions or beliefs
Usage: British spelling
2. having waves of light or other electromagnetic radiation restricted to certain directions of vibration
Usage: physics; British spelling

Examples

• The country became increasingly polarised over the controversial policy.
• Public opinion was polarised between supporters and opponents of the new law.
• The debate polarised the community into two opposing camps.
• Polarised sunglasses reduce glare from reflected light.
• The light became polarised as it passed through the special filter.
• Social media has polarised political discourse in recent years.