crush. ( krʌʃ) vb ( mainly tr) 1. to press, mash, or squeeze so as to injure, break, crease, etc. 2. (Mining & Quarrying) to break or grind (rock, ore, etc) into small particles. 3. to put down or subdue, esp by force: to crush a rebellion. 4. to extract (juice, water, etc) by pressing: to crush the juice from a lemon.