Cognomen Definis (Definis 
) , in all the world, is a rare family name. The family name Definis is habitual in Italy, where it is a rare surname, Croatia, and the United States, where it is a very rare surname. Not in comparison with a country's population, this name is the most popular in the United States, Italy, and Brazil.
| VARIANT | COUNTRY |
|---|---|
| Definis | Italy, Chile, Croatia, United States, Brazil |