ENGINE

• (noun) motor that converts thermal energy to mechanical work

• (noun) an instrument or machine that is used in warfare, such as a battering ram, catapult, artillery piece, etc.

  "medieval engines of war"

• (noun) a wheeled vehicle consisting of a self-propelled engine that is used to draw trains along railway tracks

  synonyms : locomotive , locomotive engine , railway locomotive

• (noun) something used to achieve a purpose

  "an engine of change"

WordNet® 3.0, © 2006 by Princeton University.

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