(coll.) (a woman's) close female friend; bestie; (originally written 閨密|闺密[gui1 mi4], an abbr. for 閨中密友|闺中密友[gui1 zhong1 mi4 you3])

lady's chamber; boudoir; harem

small arched door; boudoir; lady's chamber; (fig.) women

a lady's room (honorific)

a widow's chamber (old usage)