The term average most commonly refers to the arithmetic mean, but can also refer to the median, especially for asymmetric distributions where the median is typically a little smaller than the mean, which can be influenced by a few large outliers. For example, 'average income' usually refers to the median, not the mean.
Also used in hcistats2e: Chap. 12: page 137
Used in glossary entries: average, mean (μ), median, outliers