Wiktionary
adv. 1 (context literally English) in a room with a bed. 2 During sexual activity.
Wikipedia
In the Bedroom is a 2001 American crime drama film directed by Todd Field, and dedicated to Andre Dubus, whose short story Killings is the source material on which the screenplay, by Field and Robert Festinger, is based. The film stars Tom Wilkinson, Sissy Spacek, Nick Stahl, Marisa Tomei, and William Mapother.
The title refers to the rear compartment of a lobster trap known as the "bedroom" and the fact that it can only hold up to two lobsters before they begin to turn on each other.
Usage examples of "in the bedroom".
Somebody was talking softly to himself in the bedroom, and Spector had an idea who it was.
Then, finally, he broke eye contact as if it were an effort, turned and left her alone in the bedroom.
It was the sight of Chandaman and Fryer, waiting for him in the bedroom of his flat that slapped him back into reality.
He was used to soft breathing and occasional snores in the bedroom with him.
He was sleeping in the big bed then in the bedroom at the far end of the house where there were big windows on all three sides of the room and the breeze blew through at night.