1.Definition: approximating the statistical norm or average or expected value
"The average income in New England is below that of the nation", "Of average height for his age"
2.Definition: around the middle of a scale of evaluation
"An orange of average size"
3.Definition: lacking exceptional quality or ability
"A novel of average merit", "The caliber of the students has gone from mediocre to above average"
4.Definition: lacking special distinction, rank, or status; commonly encountered
5.Definition: relating to or constituting the middle value of an ordered set of values (or the average of the middle two in a set with an even number of values)
6.Definition: relating to or constituting the most frequent value in a distribution