* "Mean" can have two meanings:
* Adjective: It means "unpleasant, unkind, or cruel." This is the most common usage.
* Noun: It can refer to the average value of a set of numbers.
* "Common noun" refers to a general name for a person, place, or thing. It is not capitalized unless it is the first word of a sentence.
Therefore:
* The word "mean" is not a common noun when used as an adjective.
* The word "mean" can be a common noun when used to refer to the average.
Examples:
* Adjective: "He was in a mean mood."
* Noun: "The mean of these numbers is 10."