In one side and out the opposite or another side of: went through the tunnel. Among or between; in the midst of: a walk through the flowers. By way of: climbed in through the window. By the means or agency of: bought the antique vase through a dealer. Into and out of the handling, care, processing, modification, or consideration of: Her application went through our office. Run the figures through the computer. Here and there in; around: a tour through France. From the beginning to the end of: stayed up through the night. At or to the end of; done or finished with, especially successfully: We are through the initial testing period. Up to and including: a play that runs through December; a volume that covers A through D. Past and without stopping for: drove through a red light. Because of; on account of: She succeeded through hard work. He declined the honor through modesty. From one end or side to another or an opposite end or side: opened the door and went through. From beginning to end; completely: I read the article once through. Throughout the whole extent or thickness; thoroughly: warmed the leftovers clear through; got soaked through in the rain; a letter that was shot through with the writer's personality. Over the total distance; all the way: drove through to their final destination. To a conclusion or an accomplishment: see a matter through. Allowing continuous passage; unobstructed: a through street. Affording transportation to a destination with few or no stops and no transfers: a through bus; a through ticket. Continuing on a highway without exiting: through traffic; through lanes. Passing or extending from one end, side, or surface to another: a through beam. Having finished; at completion: She was through with the project. Having no further concern, dealings, or connection: I'm through with him. Having no more use, value, or potential; washed-up: That swimmer is through as an athlete. Doomed to death or destruction. through and through In every part; throughout: wet through and through.