Sentence:  A somewhat less fragmented hebephrenic patient of mine , who used to often seclude herself in her room , often sounded through the closed <WSD>door</WSD> - as I would find on passing by , between our sessions - for all the world like two persons , a scolding mother and a defensive child . 
Meaning of the word marked with <WSD> tags:  a swinging or sliding barrier that will close the entrance to a room or building or vehicle