1) A variant of marsh, used as a noun or adjective.
1619-21 Richard Lacie of the Marish of Folketon
1708 pasture, meadow or marrish ground, Skerne. Marishes is a place-name in the North Riding, near Pickering, and much of that area was marsh until it was drained: 1611 fermer of the marrish called Keckmarris
1619 the highway lying in le Marishe within the Constablery of Pickering. Many of these marshes were recorded in 1086.