Level

A level (sometimes also called "rank" or an equivalent term) is an abstract measure of power in a role-playing game. Characters gain levels most commonly through experience points which are accumulated through events and defeating foes. In general, the higher of a level a character has, the more things it can defeat and accomplish. A character may have an overall level, but can also have levels in certain skills and careers, especially in systems where characters can specialize into one or more classes.

Level up

In some systems, characters can level up when they gain a specified number of experience points. This is a phase of game play where the character may increase his or her stats or gain access to new abilities. Characters may also gain access to new equipment that was previously unusable.