Definition of "soutane"

The long, skimpy soutane accentuated the tallness of his stature; […] and the straight, black bar of his joined eyebrows […] suggested something unlawful behind his priesthood, the idea of a chaplain of bandits.

1904 January 29 – October 7, Joseph Conrad, Nostromo: A Tale of the Seaboard, London, New York, N.Y.: Harper & Brothers […], published 1904

Then at the door of the castle the rector had shaken hands with his father and mother, his soutane fluttering in the breeze, and the car had driven off with his father and mother on it.

1916 December 29, James Joyce, A Portrait of the Artist as a Young Man, New York, N.Y.: B[enjamin] W. Huebsch