
die Hauptsache
main thing
The most important point or aspect of a matter.
Wir können über die Details später sprechen, die Hauptsache ist, dass wir uns einig sind.
We can talk about the details later; the main thing is that we agree.
main thing
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main thing
The most important point or aspect of a matter.
Wir können über die Details später sprechen, die Hauptsache ist, dass wir uns einig sind.
We can talk about the details later; the main thing is that we agree.

as long as...
Used to express that a certain condition is the most important thing and everything else is secondary.
Hauptsache, du bist gesund!
As long as you're healthy!

main matter
In a legal context, the central matter in dispute in court proceedings, as opposed to ancillary proceedings or procedural questions.
Das Gericht hat zunächst nur über den Eilantrag entschieden, nicht über die Hauptsache.
The court initially ruled only on the urgent application, not on the main matter.
'Hauptsache' (main thing) is a compound noun made up of 'Haupt-' (meaning 'most important' or 'central') and 'Sache' (thing, matter). So it literally means 'the most important thing'.
Die Hauptstraße führt direkt durch das Stadtzentrum.
The main road leads directly through the city center.
There are two uses: as a noun with an article ('Die Hauptsache ist, ...' — the main thing is ...) and as a particle at the beginning of a sentence without an article ('Hauptsache, ...' — as long as ...). Both emphasize what is most important.
Die Hauptsache ist, dass niemand verletzt wurde.
The main thing is that no one was injured.
When a sentence begins with 'Hauptsache,', it is followed by a main clause with the verb in position two. This is an exception to the normal subordinate-clause structure.
Das Wetter ist schlecht. Hauptsache, wir haben Spaß!
The weather is bad. The main thing is that we're having fun!
The use of 'Hauptsache,' at the beginning of a sentence is very typical of spoken language and expresses a pragmatic attitude focused on what matters most.
Egal, wie teuer es war. Hauptsache, es gefällt dir!
It doesn't matter how expensive it was. As long as you like it!
The meaning 'central matter in dispute' is limited to the legal context. In everyday language, 'Hauptsache' is never used in this sense.
Der Anwalt konzentrierte sich in seinem Plädoyer auf die Hauptsache.
The lawyer focused on the main matter in his closing argument.