A character's "character level" is the total number of levels they possess, adding together all class levels they have taken. If a character only has one character class (i.e. they have not multi-classed or dual-classed their character), then their character level and class level will be the same. If a character is dual-classed or multi-classed, a character level is equal to the sum of all class levels they have taken so far. Another way of thinking of "character level" is "total level".