Definition of engineer noun from the Oxford Advanced Learner's Dictionary

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engineer

noun
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 engineer2 a person who is trained to repair machines and electrical equipmentThey're sending an engineer to fix the phone.3 a 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 English engine driver) a person whose job is driving a railway/railroad engine5 a soldier trained to design and build military structures