Definitions

1. proper noun

a Roman surname, borne by two early Christian bishops, Saint Erastus of Philippi and Saint Erastus of Paneas.

“In the New Testament, Saint Erastus of Philippi is a companion of Saint Timothy.”

2. noun

a person who is excessively devoted to a particular interest or activity.

“The erastus of the hobby is evident in his elaborate collection.”