Normal, Common
な adjective
いっぱんてき
大学卒業後も実家に住み続けることは、日本ではそこそこ一般的です。
Continuing to live in your parents’ home after graduating from college is pretty common in Japan.
If 一般 is "general"/"common" then something that has 的 attached to it is ordinary or normal or common.
The reading comes from 一般 plus 的.