n. A person who is qualified or professionally engaged in any branch of engineering.n. A person trained in a natural science that applies such knowledge towards a practical objective.n. A person who, given a practical scientific problem involving the physical world and a specific set of goals and constraints, finds a technical solution to the problem that satisfies those goals within those constraints. The goals and constraints may be technical, social, or business related.n. A person who operates an engine (such as a locomotive).v. To design, construct or manage something as an engineer.v. To alter or construct something by means of genetic engineering.v. To plan or achieve some goal by contrivance or guile; to wangle or finagle.