1Christian Church. An office-book used in processions; = processional. Now historical and rare.
2A person taking part in a procession; a person moving in or as in procession with others.
3US. An official responsible for making a procession around land to determine its bounds. Compare procession. Now historical exc. in Georgia and N. Carolina.
Origin
Late Middle English; earliest use found in Archaeological Journal. From procession + -er.