The number twenty-one represents a turning point in your life – a transition from childhood to adulthood. It also signifies that you need to be more responsible of your actions.
The number twenty-one represents the need to put aside childish pursuits and ways of thinking, and start behaving with the maturity of adulthood.
Because the age of 21 in North American represents adulthood, this dream can signify your feelings and attitudes about adulthood, freedom, responsibility, rebellion, or maturity.
If this dream is about the card game Twenty-one, see Gamble and Card.