Prayer (noun)

1. An address to God or a deity in word or thought.
2. A supplication or request to God or a deity.
3. An act of communing with God or a deity, especially through supplication.
4. A specific form of words used in praying.
5. An earnest request or wish.

Origin:

Middle english preiere, from old english præġer, from præġian to ask, from latin precarius obtained by entreaty.

Examples:

1. The prayer was said before dinner.
2. The priest led the congregation in prayer.
3. The prayer was for peace and understanding.
4. The prayer was a traditional one said at funerals.
5. He made a prayer for success in the project.