그런 + noun; 그런 거 = that kind of thing (casual)
such, that kind of
Example
저는 그런 영화를 정말 좋아해요.
I really like that kind of movie.
Word parts
Short for 그러한, from 그렇다 'to be like that'.
Good to know
그런 points to something just mentioned or known to the listener.