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the process of supplying higher mass of air by compressing the atmospheric air

Supercharging is the process of supplying higher mass of air by compressing the atmospheric air.

a form of forced induction

On top of that, Supercharging (as a 7M-GZE was said above) is a form of forced induction.

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that have their intake charge artificially compressed

In the most general sense, supercharging refers to all engines that have their intake charge artificially compressed.

one of the simplest ways to get more power out of an existing engine

Supercharging is one of the simplest ways to get more power out of an existing engine.

to a mechanical pump

Supercharging refers to a mechanical pump, belt driven from a pulley on the engine's crankshaft, which forces a pressurized fuel/air mixture in to the cylinders.

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an engine’s power output

Basically, supercharging increases an engine’s power output by compressing more fuel/air mixture into the cylinders than would be induced by normally aspirated atmospheric pressure alone, thereby creating greater burning pressures.

a belt-driven power fan

Supercharging is a belt-driven power fan that force-feeds air to do the same thing.

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The process of increasing the weight or density of air-fuel mixture or compressed air , induced into the cylinder during

The process of increasing the weight or density of air-fuel mixture or compressed air, induced into the cylinder during the induction stroke is known as 'Supercharging'.

a technique no longer confined to automotive enthusiasts

Supercharging is a technique no longer confined to automotive enthusiasts.

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an early innovation for increasing output

Supercharging was an early innovation for increasing output, first being raced in 1929, while turbocharging would not appear until 1974.

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the process of increasing the pressure OR forcing more air to get into engine

Superchargers are pressure boosting devices (compressors) which increase the pressure of the air before inletting it get into cylinder of the internal combustion engine, and the process of increasing the pressure OR forcing more air to get into engine is called as supercharging.