Is FATHERS a valid Scrabble word?

What does FATHERS mean?

Fathers is a form of FATHER.

1. noun

   a male parent (also used as a term of address to your father)

   “his father was born in Atlanta”

2. noun

   the founder of a family

   “keep the faith of our forefathers”

3. noun

   `Father' is a term of address for priests in some churches (especially the Roman Catholic Church or the Orthodox Catholic Church); `Padre' is frequently used in the military

4. noun

   (Christianity) any of about 70 theologians in the period from the 2nd to the 7th century whose writing established and confirmed official church doctrine; in the Roman Catholic Church some were later declared saints and became Doctor of the Church; the best known Latin Church Fathers are Ambrose, Augustine, Gregory the Great, and Jerome; those who wrote in Greek include Athanasius, Basil, Gregory Nazianzen, and John Chrysostom

Definitions from WordNet 3.1, Princeton University.