A prenominal adjective meaning 'that sort of' or 'such' used for something distant from both speaker and listener or unfamiliar to both.
あんな場所には二度と行きたくない。
I never want to go to a place like that again.
彼が覚えているのは、あんな小さなことで怒ったことだけだ。
All he remembers is getting angry over something like that small.
あんな考え方は、この会社には合わないと思う。
I don't think that kind of way of thinking suits this company.