die Neugründung
new founding
The act of founding a new company, organization, or institution.
Die Regierung fördert die Neugründung von Start-ups mit speziellen Programmen.
The government supports the new founding of start-ups with special programs.

new founding / startup
Loading your saved state.
new founding
The act of founding a new company, organization, or institution.
Die Regierung fördert die Neugründung von Start-ups mit speziellen Programmen.
The government supports the new founding of start-ups with special programs.

The word is a compound of 'neu' (new) and 'Gründung' (founding). So it literally describes a founding that is new.
Die Neugründung der Firma war ein großer Erfolg.
The new founding of the company was a great success.
'Neugründung' (new founding / startup) belongs to the word family around the verb 'gründen' (to found). Related words are 'der Gründer' (the person who founds something) and 'die Gründung' (the act of founding).
Jeder Gründer hofft, dass seine Neugründung erfolgreich wird.
Every founder hopes that their startup will be successful.
You can recognize the two meanings from context. If people are talking about the process or an event, the act is meant. If they are talking about an organization with employees or products, the new company is meant.
Die Neugründung des Vereins dauerte mehrere Monate.
The new founding of the association took several months.
When referring to the act of founding, the word is often used with certain nouns, e.g. 'die Neugründung eines Unternehmens' (the new founding of a company), 'eines Vereins' (of an association), or 'einer Partei' (of a party).
Die Neugründung eines Vereins erfordert viel bürokratischen Aufwand.
The new founding of an association requires a lot of bureaucratic effort.
dissolution / solution / resolution
'die Auflösung' and 'die Neugründung' are opposites when it comes to organizations, companies, or institutions. 'die Auflösung' means that something is officially ended. 'die Neugründung' means that something new is founded. You use 'Auflösung' when an existing association, company, or group no longer continues to exist. 'Neugründung' fits when a new company or organization comes into being. So the contrast is ending versus beginning.

Wegen der Neugründung eines Teams gibt es am Montag ein erstes Treffen.
Because a new team is being founded, there will be an initial meeting on Monday.
Nach finanziellen Problemen kam es zur Auflösung der kleinen Firma.
After financial problems, the small company was dissolved.