what is prayer?

Home group was tonight.

The topic was prayer.

Very broad, but what is prayer? I looked it up on dictionary.com (because i'm a complete nerd) and just to cut and paste this is what I found.

prayer –noun

1.	a devout petition to God or an object of worship.

2.	a spiritual communion with God or an object of worship, as in supplication, thanksgiving, adoration, or confession.

3. a formula or sequence of words used in or appointed for praying; the Lord's prayer.
4. prayers, a religious observance, either public or private, consisting wholly or mainly of prayer
5. that which is prayed for.
6. a petition; entreaty
7. the section of a bill in equity, or of a petition, that sets forth the complaint or action desired.

See?