subs. phr. (colloquial).Hospitality for all comers.B. E. (c. 1696).
1530. PALSGRAVE, Langue Francoyse. The Kyng is determyned to kepe house or OPEN HOUSE this Christmas.
1891. Daily Chronicle, 23 March. Mr. Verburgh, M.P., again played the part of host, and kept OPEN HOUSE in a large marquee near the winning-post.