engineer

1. (n) (by extension) A person professionally engaged in the technical design and construction of large-scale private and public works such as bridges, buildings, harbours, railways, roads, etc.; a civil engineer. 2. (n) (by extension) Originally, a person engaged in designing, constructing, or maintaining engines or machinery; now (more generally), a person qualified or professionally engaged in any branch of engineering, or studying to do so. 3. (v) (transitive) To employ one's abilities and knowledge as an engineer to design, construct, and/or maintain (something, such as a machine or a structure), usually for industrial or public use. 4. (n) (by extension) (US, firefighting) A person who drives or operates a fire engine (firefighting apparatus). 5. (n) (by extension) (chiefly US, rail transport) A person who drives or operates a locomotive; a train driver. 6. (n) (by extension) A person trained to operate an engine. 7. (n) (military, also figuratively) A soldier engaged in designing or constructing military works for attack or defence, or other engineering works. 8. (v) (transitive) (specifically) To use genetic engineering to alter or construct (a DNA sequence), or to alter (an organism). 9. (v) (transitive) To plan or achieve (a goal) by contrivance or guile; to finagle, to wangle. 10. (v) (intransitive) To formulate plots or schemes; to plot, to scheme. 11. (n) (by extension) Preceded by a qualifying word: a person who uses abilities or knowledge to manipulate events or people. 12. (n) (by extension) (often derogatory) A person who formulates plots or schemes; a plotter, a schemer. 13. (n) An honorific title given to engineers before their name. 14. (n) (by extension) (chiefly historical) A person who operates a steam engine; specifically (nautical), a person employed to operate the steam engine in the engine room of a ship. 15. (n) (military, also figuratively) (obsolete) A soldier in charge of operating a weapon; an artilleryman, a gunner. 16. (v) (intransitive) (rare) To work as an engineer.