Emily Dickinson Lexicon

AC-COUT'ER, v.t. [accoot'er. Fr. accoutrer; contracted from accoustrer, from Norm. coste, a coat, coster, a rich cloth or vestment for festivals. I think this to be the true origin of the word, rather than coudre, couture, couturier.]

In a general sense, to dress; to equip; but appropriately, to array in a military dress; to put on, or to furnish with a military dress and arms; to equip the body for military service.