The dragonfly as dream symbol mainly stands for news or transformation. The news you will receive soon may be good or bad, depending on the circumstances in your dream. If the insect comes and lays peacefully on you, this means that you are going to learn very good news soon. But if the dragonfly in your dream is dead, then the news will be bad. Moreover, seeing a dragonfly lying on an object in your house foretells a long visit paid to you by some long-distance friends.
At the same time, the dragonfly in your dream may stand for major changes in your way of thinking and in your life. You are going to experience transformations which will be for the better and will bring you more balance, harmony and happiness.
If you dream of eating a dragonfly, then you yourself are devoured, 'eaten' by crazy ideas, worries and problems or by a primitive desire or passion which cannot be repressed, wants to break to surface and you have to strive very hard to control it by resorting to the intellect.
Swarms of dragonflies in your dream may also signify the 'stains' on your soul, your guilt and fears.