What does dreaming about angel mean in the Bible?

Angels repeatedly reached people in their sleep: Joseph was told in dreams to take Mary as his wife and to flee to Egypt. Angels are messengers and guardians sent by God — never objects of worship. If an angelic presence marked your dream, weigh its message against Scripture; God's true messengers always agree with His word. In the SoulGuide Dream Guide, angel is filed under people & beings — one of 54 symbols in the guide — and is answered with 3 King James Version passages quoted in full: Matthew 1:20, Psalms 91:11, Hebrews 13:2. Each passage below carries a short note explaining why it applies to angel, so the entry can be read on its own without the rest of the guide.

“But while he thought on these things, behold, the angel of the LORD appeared unto him in a dream, saying, Joseph, thou son of David, fear not to take unto thee Mary thy wife: for that which is conceived in her is of the Holy Ghost.”

“For he shall give his angels charge over thee, to keep thee in all thy ways.”

“Be not forgetful to entertain strangers: for thereby some have entertained angels unawares.”