1. (plow through something) to finish doing something that takes a long time and is difficult or boring: Bob was the only one to plow through all three volumes.2. (plow through someone/something) to crash through something or a group of people with force, especially because you are moving or driving too quickly or in a careless or uncontrolled way: The car mounted the curb and plowed through the safety barrier.3. (plow through something) to move through something with a lot of difficulty: We had been plowing through the mud for nearly an hour when the wheels finally locked