Technically these all can be referred to as average but as you might expect average can be manipulated to explain things from different vantage points. The median is the mid-point in a distribution of values among cases with an equal number of cases above and below the median. Its also the meanest because it take the most math to figure it out.
For example if you have the numbers 1 3 5 and 7 the middle numbers are 3 and 5 so.
The median is the middle value in the list of numbers. Median - The middle value when the values are ranked. Its also the meanest because it take the most math to figure it out. Mean - The sum of values divided by the number of values.