To make something ineffective by applying an opposite force or effect. The antidote was used to neutralise the poison in his system.
To render a military target harmless by destroying or disabling it. The airstrike was launched to neutralise the enemy's radar installations.
To counteract or cancel the effect of something. The new policy aims to neutralise the impact of inflation on the economy.
To make a solution chemically neutral, neither acidic nor basic. The chemist added a base to the solution to neutralise the acid.
To kill or otherwise eliminate a person regarded as a threat, especially in military or law-enforcement contexts (euphemistic). The special forces were ordered to neutralise the suspected insurgent leader.