1. to make something ineffective or harmless by counteracting its effect
Usage: British spelling
2. to make a country or area neutral in a war or conflict
Usage: political/military context
3. to make a chemical solution neither acidic nor basic
Usage: chemistry

Examples

• The antidote will neutralise the poison in your system.
• We need to neutralise the threat before it spreads.
• The treaty aimed to neutralise the disputed territory.
• Add lime to neutralise the acidic soil.
• The security team worked to neutralise the bomb.
• This medication can neutralise excess stomach acid.
• The peace agreement helped neutralise tensions between the countries.