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n. 1. a. A machine that converts energy into mechanical force or motion. b. Such a machine distinguished from an electric, spring-driven, or hydraulic motor by its use of a fuel. 2. a. A mechanical appliance, instrument, or tool: engines of war. b. An agent, instrument, or means of accomplishment. 3. A locomotive. 4. A fire engine. 5. Computers A search engine. tr.v. en·gined, en·gin·ing, en·gines To equip with an engine or engines. [Middle English engin, skill, machine, from Old French, innate ability, from Latin ingenium; see genə- in the Appendix of Indo-European roots.] |
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