1. a substance that causes oxidation by accepting electrons from another substance
Usage: chemistry
2. a chemical compound that provides oxygen for combustion in rockets or explosives
Usage: aerospace; military

Examples

• Hydrogen peroxide is a common oxidizer used in rocket fuel.
• The fire department stores oxidizers separately from flammable materials.
• Chlorine acts as an oxidizer in many chemical reactions.
• The rocket engine requires both fuel and an oxidizer to function.
• Safety protocols require careful handling of strong oxidizers.
• Oxygen is the most familiar oxidizer in everyday combustion.