According to Wikipedia, “grinding” is defined as “performing repetitive tasks for gameplay advantage. In MMORPG, for instance, it can be advantageous to repeatedly kill AI-controlled monsters, using basically the same strategy over and over again to advance one's character level and to unlock content. Grinding may be required by some games to unlock additional features such as level progression or additional items”. Although I broadly agree with this summation, I feel that “grinding” is one of those terms that can also be very subjective. Repetitious content has a specific purpose in video games, especially the MMO genre. Not all of it is tedious or egregious. Therefore, it is a question of degrees. Killing 25 mobs of a specific species may be a tolerable number. A challenge but not a task that out stays its welcome. However, double that amount a suddenly a line has been crossed. The entire undertaking now feels like it has been inflated simply to slow player progress down, which is more than likely the exact purpose of the task.