Learner's definition of ANGEL
a spiritual being that serves especially as a messenger from God or as a guardian of human beings
see also guardian angel
a person (such as a child) who is very good, kind, beautiful, etc.
Your son is such an angel!
He's not a bad kid, but he's no angel.
Be an angel and get me a cup of tea, would you?
[more angelic; most angelic]