'Private' in the Bible

“If your brother sins, go and show him his fault in private; if he listens to you, you have won your brother.

and Joanna the wife of Chuza, Herod’s steward, and Susanna, and many others who were contributing to their support out of their private means.

It was because of a revelation that I went up; and I submitted to them the gospel which I preach among the Gentiles, but I did so in private to those who were of reputation, for fear that I might be running, or had run, in vain.