Conversation so far:
What is the definition of Melungeon?
Melungeon is a term traditionally applied to one of numerous tri-racial isolate groups of the Southeastern United States.
Were the Melungeons considered a certain race on their own?
Tri-racial describes populations thought to be of mixed European, African and Native American ancestry.
Were there more dominant characteristics among the Melungeons?
Most Melungeon are generally European American in appearance, often with dark hair and eyes, and a swarthy or olive complexion.
Has the definition of Melungeon changed?
In the 19th and early 20th century, Melungeons were sometimes identified as Portuguese, Native American, or light-skinned African American.

Question: Has that definition be consistent?
Self-contained rewrite: Has the definition of Melungeon been consistent?