1. to reduce or eliminate the polarization of (light, electromagnetic radiation, or a political/social group)
Usage: British spelling (American: depolarizes); Physics/optics sense: to cause unpolarized or randomly polarized light; Social/political sense: to reduce ideological division or extreme positions
2. to reduce the electrical potential difference across (a cell membrane or electrode)
Usage: Biology/physiology: used in neuroscience and cellular biology

Examples

• The filter depolarises the incoming light beam for the experiment.
• Sodium ions depolarise the neuron membrane during an action potential.
• The new policy aims to depolarise the heated debate between opposing factions.
• Depolarises light waves to reduce glare in optical instruments.
• When the cell membrane depolarises, it triggers nerve impulses.
• The mediator worked to depolarise the political climate in the region.