Symbolic of being important in your own eyes or the eyes of others, 1 Sam. 9:2. Being tall is also symbolic of a person of high social standing, Isa. 10:33
Does not indicate greatness
Having a tail in a dream means having a following of people or students.
To dream of being very tall or growing taller could mean you are looking down on other people. This dream can also mean you are coming into your own in terms of confidence, power and pride.
To dream that others are taller than you suggests that you may have a tendency to overlook things. Perhaps you feel that a higher power is always looking over you and judging your actions.
If you dream of someone you know being taller in your dream than in real life, you may worry about being judged or looked down on by them. Or you could be jealous of them in some way.