In general:

Y as a spoken, written or formed letter usually points to something unknown, which is to be further explored. More rarely it shows sexual needs. The Y symbolizes the man who takes up with outstretched arms to spirituality or God.

Psychologically:

Ypsilon, the second last letter of the alphabet is the symbol of the union of male and female in our soul (the Yin and Yang in Chinese mythology), which makes a burden lighter. A ypsilon shaped piece of wood (such as a branch fork), placed under a load means, for example, that a particular burden is imposed on our lives, easy to carry or even be taken from us. Ypsilon is the divining rod-shaped, so that the characters or objects in its form can sometimes translate to a finding of new opportunities. In the spiritual mind Y stands for the duality which need to be united.

Spiritually:

The Y stands for the spiritual questions.