How to use machine in a sentence. The term is commonly applied to artificial devices, such as those employing engines or motors, but also to natural biological macromolecules, such as molecular machines. Heat engines, including internal combustion engines and external combustion engines (such as steam engines) burn a fuel to create heat, which is then used to create motion. Of, relating to, or felt to resemble a machine: machine repairs; machine politics. A simple machine is a mechanical device that changes the direction or magnitude of a force. Government a group of persons that controls a political party: the Democratic party machine. An engine or motor is a machine designed to convert energy into useful mechanical motion. Jun 1, 2025 ยท A machine is a device with several parts that work together to perform a task. MACHINE definition: an apparatus consisting of interrelated parts with separate functions, used in the performance of some kind of work. Meaning, pronunciation, picture, example sentences, grammar, usage notes, synonyms and more.

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