A fixture is a work-holding or support device used in the manufacturing industry. Fixtures are used to securely locate and support the work, ensuring that all parts produced using the fixture will maintain conformity and interchangeability.
The act or process of fixing : the state of being fixed. 2a : something that is fixed or attached (as to a building) as a permanent appendage or as a structural part a plumbing fixture. b : a device for supporting work during machining.