1. a person skilled in computation or calculation; a mathematician or accountant
Usage: somewhat formal or archaic; historically used to refer to ecclesiastical scholars who calculated the date of Easter

Examples

• The medieval computist worked tirelessly to determine the correct date for Easter each year.
• A skilled computist was essential to the monastery's administrative operations.
• The computist's calculations were crucial for managing the estate's finances.
• In the early church, computists held positions of great responsibility and respect.