Sentence:  A somewhat less fragmented hebephrenic patient of mine , who used to often seclude herself in her room , often sounded through the closed door - as I would find on passing by , between our <WSD>sessions</WSD> - for all the world like two persons , a scolding mother and a defensive child . 
Meaning of the word marked with <WSD> tags:  a meeting for execution of a group's functions