I was reading a short story "WHAT'S IN ALASKA" by Raymond Carver and came across two instances of "turn" of which meanings I'm not sure about.
(1) “When we lived in the city,” Mary said, “people said you could see who'd turned on the night before by looking at their kitchen in the morning. We had a tiny kitchen when we lived in the city,” she said.
I checked the all the definitions of turn in dictionaries but none seems to fit. Or should I regard "turn on" as a phrase meaning to get intoxicated by a drug ? (Though, if so, it still eludes me how you can tell who used drugs by looking at the kitchen, or why you have to look at the kitchen at all.)
(2) Just as he started to turn off the lamp, he thought he saw something in the hall. He kept staring and thought he saw it again, a pair of small eyes. His heart turned. He blinked and kept staring.
I've heard of someone's stomach turning, but never their heart. Does it convey the similar sense of to be upset/disturbed ?