mean

A word means something when the word expresses the same idea as the other something.

Example: Slay means kill. Both of them mean to make dead.

When you are a mean person, you are not nice.

Example: The boys who hit you were very mean.

The mean is a measure of the average of a list of numbers. The sum total of the numbers divided by how many numbers in the list.

Example: The mean of the numbers 2,3,4 is 3. (2+3+4)/3 = 9/3 = 3.