Definitions

1. adjective

relating to or designating something added at the end, especially of a word, a name, or a title, such as an honorific suffix or an occupational or familial suffix in a person’s name.

“The postfixial -son in the name is a sign of respect for the family.”

2. noun

a word or suffix added at the end of another word or name, especially an honorific or occupational suffix.

“The postfixial -ist is often used to create a title for a profession.”