Definitions
1.nounOne skilled in the theory or construction of machines."The Cotton-Gin is a machine to separate the seeds from cotton, invented by that celebrated mechanician, E. Whitney. -- from the 1828 Webster's Dictionary."
2.nounOne skilled in building, using, or repairing machines, or who makes machines or tools.
3.nounOne skilled in mechanics.
4.nounA machinist.
5.nounA scientifically trained practitioner.
6.nounA mechanic.