Verb
1. make politically neutral and thus inoffensive;
"The treaty neutralized the small republic"2. make ineffective by counterbalancing the effect of;
"Her optimism neutralizes his gloom""This action will negate the effect of my efforts"3. oppose and mitigate the effects of by contrary actions;
"This will counteract the foolish actions of my colleagues"4. get rid of (someone who may be a threat) by killing;
"The mafia liquidated the informer""the double agent was neutralized"5. make incapable of military action
6. make chemically neutral;
"She neutralized the solution"