1. the process of making something neutral or ineffective; the act of counteracting or canceling out the effect of something
Usage: British spelling; American spelling is 'neutralization'
2. in chemistry, a reaction between an acid and a base that produces a salt and water
Usage: technical; chemistry
3. the process of making a country or region neutral in international conflicts
Usage: political; international relations

Examples

• The neutralisation of the threat required swift military action.
• The neutralisation of stomach acid helps relieve heartburn.
• The treaty called for the neutralisation of the disputed territory.
• Antibodies work by neutralisation of harmful pathogens in the bloodstream.
• The government sought the neutralisation of the rebel group's influence.
• In the experiment, we observed the neutralisation of the acidic solution with a base.