Webster's Revised Unabridged Dictionary · 1913

Batman

Batman (bat"man) , noun

[Turkish batman.]

A weight used in the East, varying according to the locality; in Turkey, the greater batman is about 157 pounds, the lesser only a fourth of this; at Aleppo and Smyrna, the batman is 17 pounds. — Simmonds

Batman (ba"man or bat"man) , noun

[French bât packsaddle + English man. Compare Bathorse.]

A man who has charge of a bathorse and his load. — Macaulay