1. A hand that is open and pointing towards the sky is giving the "Fear not!" gesture of ancient times. Therefore, if you see this symbol, whether the hand is of a person or is totally disembodied, something that you're afraid of is actually nothing to fear. 2. Beautiful, well-kept hands indicate satisfaction in life, while dirty hands indicate some kind of "mess" in your life that needs to be "cleaned up." 3. Hands that are working diligently indicate success and good fortune through the dreamer's own efforts. 4. Hands that caress the dreamer or someone else in the dream, including a pet, imply happiness in love, while hands that are waving in farewell indicate temporary separations. 5. Tied hands imply obstacles in attaining one's goals, while shaking hands imply either a new friend or a reunion with an old one. 6. Injured or bandaged hands indicates delays in attaining one's goals; look to other symbols in the dream to discern how these delays can be subverted, or, if they're inevitable, how best the time during the delays can be spent.
The hand can express so many gestures, it's no wonder there are so many symbols, both offensive and defensive. Many hands symbols combine the eye symbol in the open palm area as a protective amulet.