Cracked meaning : To form cracks. To break apart under pressure. To become debilitated by psychological pressure. To break down or yield, especially under interrogation or torture. To make a cracking sound. (of a voice) To change rapidly in register. (of a pubescent boy's voice) To alternate between high and low register in the process of eventually lowering. To make a sharply humorous comment. To make a crack or cracks in. To break open or crush to small pieces by impact or stress. To strike forcefully. To open slightly. To cause to yield under interrogation or other pressure. (Figurative) To solve a difficult problem. (Figurative, from cracking a nut.) To overcome a security system or a component. To cause to make a sharp sound. To tell (a joke). To break down (a complex molecule), especially with the application of heat: to pyrolyse. To circumvent software restrictions such as regional coding or time limits. To open a canned beverage, or any packaged drink or food. To brag, boast. To be ruined or impaired; to fail. Broken so that cracks appear on, or under, the surface. Broken into coarse pieces. (of a voice) Harsh or dissonant. Crazy; crackpot.