An angel is a spiritual (without a physical body) or heavenly supernatural being. In Western belief-systems the term is often used to distinguish benevolent and malevolent intermediary beings. It is often depicted as a messenger or intermediary between God (the transcendent) and humanity (the profane) in various traditions like the Abrahamic religions. Other roles include protectors and guides for humans, such as guardian angels and servants of God.
https://en.wikipedia.org/wiki/Angel