Moderate as in stimulator A substance used to drive or propel something forward, often found in devices like rockets or engines. Clear All
2 Example Sentences Showcasing the Meaning of 'Propellant'
The firefighter aimed the propellant at the base of the flames, swiftly extinguishing the fire.
The antique cannon was restored to its former glory, with a new propellant for historical reenactments.
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