'Form' in the Bible

Who, being in the form of God, thought it not robbery to be equal with God:

But made himself of no reputation, and took upon him the form of a servant, and was made in the likeness of men:

After He was found in [terms of His] outward appearance as a man [for a divinely-appointed time], He humbled Himself [still further] by becoming obedient [to the Father] to the point of death, even death on a cross.