a machine that converts one form of energy into another, esp. mechanical energy into electrical energy, as a dynamo, or electrical energy into sound, as an acoustic generator.

a person or thing that generates.

Chemistry . an apparatus for producing a gas or vapor.

Mathematics .

an element or one of a set of elements from which a specified mathematical object can be formed by applying certain operations.

an element, as a line, that generates a figure.

Computers . a program that produces a particular type of output on demand, as random numbers, an application program, or a report.

noun

alternator , dynamo