Definition of engineer noun from the Oxford Advanced Learner's Dictionary
engineer
noun
ˌendʒɪˈnɪə(r) ˌendʒɪˈnɪr
1a person whose job involves designing and building engines, machines, roads, bridges, etc. see also chemical engineer, civil engineer, electrical engineer, lighting engineer, mechanical engineer, software engineer, sound engineer2a person who is trained to repair machines and electrical equipmentThey're sending an engineer to fix the phone.3a person whose job is to control and repair engines, especially on a ship or an aircrafta flight engineerthe chief engineer on a cruise liner4(North American English) (British Englishengine driver)a person whose job is driving a railway/railroad engine5a soldier trained to design and build military structures
ˌendʒɪˈnɪə(r) 
ˌendʒɪˈnɪr 
1 a person whose job involves designing and building engines, machines, roads, bridges, etc. see also chemical engineer, civil engineer, electrical engineer, lighting engineer, mechanical engineer, software engineer, sound engineer