surcoat

n. [ OE. surcote, OF. surcote. See Sur-, and Coat, and cf. Overcoat. ] 1. A coat worn over the other garments; especially, the long and flowing garment of knights, worn over the armor, and frequently emblazoned with the arms of the wearer. [ 1913 Webster ]

A long surcoat of pers upon he had.. Chaucer. [ 1913 Webster ]

At night, or in the rain,
He dons a surcoat which he doffs at morn. Emerson. [ 1913 Webster ]

2. A name given to the outer garment of either sex at different epochs of the Middle Ages. [ 1913 Webster ]