'Understanding' in the Bible

Then Ezra the priest brought the law before the assembly of men, women and all who could listen with understanding, on the first day of the seventh month.

Now the rest of the people, the priests, the Levites, the gatekeepers, the singers, the temple servants and all those who had separated themselves from the peoples of the lands to the law of God, their wives, their sons and their daughters, all those who had knowledge and understanding,