Meanings
there (to or into that place; thither)
over, gone
Das Auto ist leider dahin, da kann man nichts mehr tun.Unfortunately, the car is broken, there is nothing more that can be done.
then
Bis dahin hab eine schöne Woche.
Examples
GermanEnglish
Er hatte Angst, dahin zu gehen.He was afraid to go there.
Wie lange würden wir zu Fuß dahin brauchen?How long would it take us to walk there?