What is the meaning of Dynamo?

An electricity generator; a dynamo-electric machine.

The mechanism by which a celestial body, such as the Earth or a star, generates a magnetic field.

An energetic person.

dynamo (electricity generator)

dynamo (small electricity generator)

small dynamo (direct current generator)

dynamo (energetic person)

dynamo

dynamo, dynamo-electric machine, DC generator (electrical machine whose main function is to convert mechanical energy into electricity)

dynamo (part of a bicycle or other device that allows powering, e.g., lights by converting rotary motion into electricity)

Source: wiktionary.org