1 a person who promotes.
2 a person who finances, organizes, etc. a sporting event, theatrical production, etc.
3 (in full company promoter) a person who promotes the formation of a joint-stock company.
4 Chem. an additive that increases the activity of a catalyst.
Etymology: earlier promotour f. AF f. med.L promotor (as PROMOTE)
Useful english dictionary. 2012.