Definitions of average:

• noun:   a statistic describing the location of a distribution
• verb:   achieve or reach on average

  Example: "He averaged a C"

• verb:   amount to or come to an average, without loss or gain

  Example: "The number of hours I work per work averages out to 40"

• verb:   compute the average of
• adjective:   around the middle of a scale of evaluation of physical measures

  Example: "An orange of average size"

• adjective:   approximating the statistical norm or average or expected value

  Example: "The average income in New England is below that of the nation"

• adjective:   of no exceptional quality or ability

  Example: "A novel of average merit"

• adjective:   lacking special distinction, rank, or status; commonly encountered

  Example: "Average people"

• adjective:   relating to or constituting the middle value of an ordered set of values (or the average of the middle two in an even-numbered set)
• adjective:   relating to or constituting the most frequent value in a distribution