There's no singular, universally accepted meaning for a "black tribal sun." The meaning is likely tied to the specific tribe or culture where it originates.

Here's why it's hard to give a definitive answer:

* "Tribal" is broad: This term encompasses a vast range of cultures with diverse beliefs and symbolism. A sun symbol could have different meanings in different tribes.

* Black as a color: Black often represents darkness, mystery, the unknown, or even death in many cultures. However, it can also symbolize strength, power, or protection.

* The sun as a symbol: Across many cultures, the sun represents life, warmth, energy, and creation.

To understand the meaning of a black tribal sun, you'd need more context:

* Origin: Which tribe or culture does the symbol belong to?

* Specific design: Are there other elements in the design? Does it have specific patterns or shapes?

* Context: Where was the symbol seen? Was it on clothing, a tattoo, a religious artifact?

With more information, we might be able to decipher the meaning of the "black tribal sun" more accurately.