(Guernsey, now historical) A low bed covered in dry fern or straw for people to sit or recline on, traditionally found in cottages or farmhouses.
1974, GB Edwards, The Book of Ebenezer Le Page, New York 2007, p. 8:He would lie on the green-bed all day long sewing pictures of boats on canvas with coloured wools.
1980, John McCormack, The Guernsey House, p. 77:The green bed was formerly to be found in every farmhouse at the side of the hearth opposite the bread oven.