1. Unreasonably or perversely unyielding.
  2. Justifiably unyielding.
  3. Suggestive or typical of a strong stubborn nature.
  4. Performed or carried on in an unyielding, obstinate, or persistent manner.
  5. Difficult to handle, manage, or treat.

The emotion of Stubborness is found in the Pericardium meridian in the Fire element.

Definition from Dictionary by Merriam-Webster.