Definition: The word "hard rock" means something that is not soft or gentle, but rather firm, hard, or strong in nature. It can also be used as a noun to describe something that is hard or difficult. In general, when someone says that something is "hard rock", they are referring to something that is challenging and difficult to play with, which requires high skill levels and dedication. "Hard rock" typically refers to items like guitars, drums, bass, keyboards, etc. It can also be used in the context of sports or other activities where playing hard rock music helps to motivate players and improve their performance. However, if someone says that something is "hard rock", they are not necessarily referring to a specific type of material or style of music, but rather something that is very difficult to play with. In this case, it could refer to anything that requires a high level of skill or effort to perform properly and efficiently.