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1. To prolong something tediously: The teacher dragged out the lecture with boring stories. The director dragged the rehearsal out until late in the evening.
2. To be prolonged to the point of tedium: The movie dragged out and I fell asleep.
3. To extract some information from someone by means of a long, drawn-out process: The police dragged the confession out of the suspect. The prosecutor dragged out the truth from the witnesses.