Water is as immense and complex symbol in dream interpretation despite the fact that we see it every day. To see it in your dreams means some of that same intense meaning is present.
If you have a dream in which you need to drink water it means that there is something that you really want. You are thirsty for something so this is why you need to drink water. The cliché thing that people thirst for is knowledge, but you do not define yourself or your existence by clichés most probably, so you need to make sure that you go out there and seize the day. If you are reading this you probably know what it is that you are after in life, you already know what it is that you want so you wonâ€™t have to do so much soul searching. Whatever it is, go after it with strength and fervor.
If you have a dream about drinking water it means that you are satiating something which you have needed for a long time. You have wanted something for a very long time and now you are finally getting it. Water also represents emotion so it is probable that if you have a dream about drinking water you are ingesting pure emotion, someone around you has been very emotionally expressive to the point that whenever you are around them you feel like you are ingesting pure emotion.