der Rechtsstreit
legal dispute
A dispute between two or more parties that is handled in court; a lawsuit.
Der Rechtsstreit zwischen den beiden Unternehmen dauerte mehrere Jahre.
The legal dispute between the two companies lasted several years.

legal dispute
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legal dispute
A dispute between two or more parties that is handled in court; a lawsuit.
Der Rechtsstreit zwischen den beiden Unternehmen dauerte mehrere Jahre.
The legal dispute between the two companies lasted several years.

This noun is made up of 'das Recht' (the law/right) and 'der Streit' (the dispute). So it literally describes a dispute that is fought out by legal means, that is, before a court.
Aus einem kleinen Nachbarschaftskonflikt wurde ein jahrelanger Rechtsstreit.
A small neighborhood conflict turned into a years-long legal dispute.
Common verbs used with 'Rechtsstreit' (legal dispute) are 'einen Rechtsstreit führen' (to conduct/be involved in a legal dispute), 'einen Rechtsstreit gewinnen/verlieren' (to win/lose a legal dispute), or 'einen Rechtsstreit beilegen' (to settle a legal dispute peacefully).
Die beiden Parteien konnten den Rechtsstreit außergerichtlich beilegen.
The two parties were able to settle the legal dispute out of court.
To name the parties involved, you use the preposition 'zwischen' (between) with the dative. The reason for the dispute is often expressed with 'um' (over/about) with the accusative.
Der Rechtsstreit zwischen den Geschwistern um das Erbe war sehr kompliziert.
The legal dispute between the siblings over the inheritance was very complicated.
process / trial
'der Prozess' and 'der Rechtsstreit' can both refer to a dispute in court. 'der Rechtsstreit' emphasizes the dispute between the parties, that is, the conflict over a right or a claim. 'der Prozess' emphasizes the court proceedings themselves, with hearings, evidence, and a decision. Learners may confuse the words because a legal dispute is often fought out in a trial. If the conflict is the focus, 'Rechtsstreit' fits. If the proceedings before a court are meant, 'Prozess' is more natural.

Nach dem Streit um die Wohnung haben die Nachbarn einen Rechtsstreit begonnen.
After the dispute over the apartment, the neighbors began a legal dispute.
Am Montag beginnt der Prozess vor dem Landgericht.
The trial begins on Monday at the regional court.