—v.t. 1. to make neutral; cause to undergo neutralization.
2. to make (something) ineffective; counteract; nullify: carelessness that neutralized our efforts. 3. Mil.to put out of action or make incapable of action: to neutralize an enemy position. 4. to declare neutral; invest with neutrality in order to exempt from involvement during a war: to neutralize a city to prevent bombing. 5. to add an acid to a basic solution or a base to an acidic solution until the resulting solution is chemically neutral (pH = 7).
6. Elect.to render electrically or magnetically neutral.
—v.i. to become neutral or neutralized; undergo neutralization: With this additive the solution begins to neutralize.Also,esp. Brit.,neu'tral•ise".