Angel (noun)

1. A spiritual being believed to act as an attendant, agent, or messenger of God, conventionally represented in human form with wings and a long robe.
2. A person of exemplary conduct or virtue.
3. A person who is kind and helpful.
4. A financial backer or investor.

Origin:

Old english, from ecclesiastical latin angelus, from greek angelos "messenger".

Examples:

1. The angel appeared to Mary and told her that she would give birth to Jesus.
2. The little girl believes her grandmother is an angel watching over her.
3. The volunteer is an angel, always willing to help others.
4. The business was able to succeed thanks to the support of an angel investor.
5. The couple's friend is their angel, always ready to lend a helping hand.