noun

• (historical, northern British) A bench, a settle, a pew.
  "[page 211] The Mer-man he stept o'er ae deas, / And he has steppit over three: / "O maiden, pledge me faith and troth! / O Marstig's daughter, gang wi' me!" […] [pages 213–214] Notes on The Mer-man. […] I remember having seen in the hall of the ruined castle of Elan Stalker, in the district of Appin, an old oaken deas, which was so contrived as to serve for a sittee; at meal-times the back was turned over, rested upon the arms, and became a table; and at night the seat was raised up, and displayed a commodious bed for four persons, two and two, feet to feet, to sleep in. I was told, that this kind of deas was formerly common in the halls of great houses, where such œconomy, with respect to bed-room, was very necessary."
• (obsolete) An elevated table in a hall at which important people were seated; a high table.
  "As the principal table was always placed upon a dais, it began very soon, by a natural abuse of words, to be called itself a Dais, and people were said to sit at the dais, instead of at the table upon the dais."