Definition of "propellant"

anything that propels

1. fuel, oxidizer, reaction mass or mixture for one or more engines (especially internal combustion engines or jet engines) that is carried within a vehicle prior to use  examples

2. the compressed gas in a pressurised container (especially an aerosol can) that is used to expel its content  examples

3. the explosive (cordite, gunpowder, etc) found in ammunition cartridges  examples

Alternative spelling of propellent  examples