polarize
US /ˈpoʊ.lə.raɪz/
UK /ˈpoʊ.lə.raɪz/
1.
to cause (people, opinions, etc.) to separate into opposing groups
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The controversial issue continued to polarize public opinion.
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His radical views tend to polarize his audience.
2.
to restrict the vibrations of (light waves or other electromagnetic radiation) to one direction
:
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The sunglasses are designed to polarize light, reducing glare.
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Scientists use special filters to polarize the laser beam.