motor that converts thermal energy to mechanical work | the means whereby some act is accomplished |
a wheeled vehicle consisting of a self-propelled engine that is used to draw trains along railway tracks | a device that requires skill for proper use |
an instrument or machine that is used in warfare, such as a battering ram, catapult, artillery piece, etc. | any of various devices or contrivances that can be used to produce musical tones or sounds |
something used to achieve a purpose | (law) a document that states some contractual relationship or grants some right |
| the semantic role of the entity (usually inanimate) that the agent uses to perform an action or start a process |
| a person used by another to gain an end |