'Fulfill' in the Bible

Now all this took place to fulfill what was spoken by the Lord through the prophet:

Then he went and settled in a town called Nazareth to fulfill what was spoken through the prophets, that He will be called a Nazarene.

Jesus answered him, “Allow it for now, because this is the way for us to fulfill all righteousness.” Then he allowed Him to be baptized.

This was to fulfill what was spoken through the prophet Isaiah:

“Don’t assume that I came to destroy the Law or the Prophets. I did not come to destroy but to fulfill.