Tax Rolls "66.667% Undivided Interest"

[Samantha M.]

I was researching some properties in a subdivision and found one that read

Legal Description:
Green Hills Addition
Blk 14 Lot 5
66.667% Undivided Interest

Does the "66.667% undivided interest" indicate this is an estate / probate property? What does the term 66.667 undivided interest mean exactly?

Thanks!