noun

1. Now Rare a person who makes engines
2. a person skilled or occupied in some branch of engineering a mechanical engineer
3. 1. a person who operates or supervises the operation of engines or technical equipment a locomotive engineer, radio engineer
   2. a specialist in planning and directing operations in some technical field
4. a skillful or clever manager
5. Mil. a member of a military engineering unit trained in the construction and demolition of bridges, roads, airfields, etc.

Etymology: earlier enginer < ME enginour < OFr engigneur

transitive verb

1. ☆ to plan, construct, or manage as an engineer
2. ☆ to plan and direct skillfully; superintend; guide (a measure, action, etc. through)