Definition of "turn over" [turn over]

• Used other than as an idiom: see turn,‎ over. (verb)
• To flip over; to rotate uppermost to bottom. (verb)
• To relinquish; give back. (verb)
• To transfer. (verb)
• To produce, complete, or cycle through. (verb)

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• "Histone genes characteristically turn over at a rate of one mutation per billion years."
• "Robert Shivers said, “They flatly refused to turn over the wireless messages.”"
• "That, she knew, was out of the question, as it would ruin his life; calling the police was out of the question; leaving him alone to continue with the escalating madness of his delusion was out of the question, as she had no doubt that he would turn over heaven and earth to kill Pastranzo, or the next person the delusion told him to kill."