If you dream that you see the dragonfly, who lands on you, then it shows the return of someone very important form your past. The dead dragonfly signifies new that wont be pleasant to you. If the dragonfly perched beautifully on somewhere, it shows that you will have someone in contact with you, but it will bring too much stress for you.
Dream dictionary: Dragonfly dream meanings
If you see the dragonfly in a dream, then such dream indicates the new opportunities and variations in your waking life. The dream could also show that things which appear in your life are not the way you thought they are. If you have been eating the dragonfly, then it shows the behavior of yours that is not appropriate. Perhaps you hurt someone by your cruel actions.
The dragonfly is very favorable omen which indicates the unexpected happiness and help from those you are surrounded by.
Symbolizes lightness, frivolity and inconstancy.