'Appearance' in the Bible

Then was Nebuchadnezzar full of fury, and the form of his appearance was changed against Shadrach, Meshach, and Abednego: [therefore] he spoke, and commanded that they should heat the furnace seven times more than it was usually heated.

It happened, when I, even I Daniel, had seen the vision, that I sought to understand it; and behold, there stood before me as the appearance of a man.

his body also was like the beryl, and his face as the appearance of lightning, and his eyes as flaming torches, and his arms and his feet like burnished brass, and the voice of his words like the voice of a multitude.

Then there touched me again one like the appearance of a man, and he strengthened me.