This term corresponds to definition 2.
There are multiple definitions - click on the translation that matches your context.
someone who has helped encourage and develop a plan, project, movement, or other happening or event
Mr Baldessari was a prime mover in the Conceptual Art revolution, when the art object was in disrepute and ideas were pre-eminent.
someone who makes a formal proposal at a meeting, assembly, or other official gathering of people
After the mover's speech, the debate must be adjourned.
someone who moves eg who moves from one house to another
INSURANCE: Includes mover's coverage of $2 per pound for damage to common household goods and personal effects.