One in authority over others; a chief; usually, an overseer or boss. [Webster 1913 Suppl.]
An arbiter. [Webster 1913 Suppl.]
In the philosophy of Nietzsche, a man of superior physique and powers capable of dominating others; one fitted to survive in an egoistic struggle for the mastery. [Webster 1913 Suppl.]
overman, v. & n.
--v.tr. (-manned, -manning) provide with too large a crew, staff, etc.
--n. (pl. -men)
1 an overseer in a colliery.
2 Philos. = SUPERMAN.