To render neutral; to reduce to a state of neutrality.
- To make neutral.
- To counterbalance or counteract the effect of; render ineffective.
- To declare neutral and therefore inviolable during a war.
- Chemistry To make (a solution) neutral.
- Chemistry To cause (an acid or base) to undergo neutralization.
- Medicine To counteract the effect of (a drug or toxin).
- Slang To remove as a threat, especially by killing.