- The parts or pieces of construction equipment that make it possible for the equipment to do its work, such as tracks on a dozer or cables on a crane. In the case of towed equipment, such as a scraper, the whole tractor becomes a prime mover.
- A device, apparatus, or system which converts a natural source of energy, such as sunlight, wind, or flowing water, into mechanical energy or power. Examples include heat engines and turbines. 2. A prime mover (1) within a power plant.
- noun somebody or something which has the most influence over the starting of a process or activity