BDB1094
בִּיתָן noun [masculine] house, palace — absolute הַבִּיתָן Esth 7:7; Esth 7:8 (׳ גִּנַּת הב); construct בִּיתַן Esth 1:5 ( הַמֶּלֶךְ ׳ גִּנַּת ב), all garden of ׳ בּ; according to DieulafoyRŠJ 1888, cclxxvii. throne-room, synonym of apadâna in meaning, but compare אַפֶּדֶן.