1. 1

   main thing, most important thing

   • Seine Pflicht erkennen und tun, das ist die Hauptsache.

     The main thing is that he knows and performs his duty.

     Tatoeba · Esperantostern · CC BY 2.0 FR

   • Wir haben immer noch uns, und das ist die Hauptsache.

     We've still got each other, and that's the main thing.

     Tatoeba · hjoest · CC BY 2.0 FR

2. 2

   main issue

Forms in lighter type are derived by the standard declension rules from the nominative, genitive and plural.

1. 1

   as long as, expresses that the following is the most important goal, prioritised over anything else

2. 2

   at least, most importantly, specifically, expresses gladness about a fact being true even if other things might not be ideal — i.e. Glück im Unglück