Wiktionary
adv. (context idiomatic English) usual, typically; as a rule; as often as not. alt. (context idiomatic English) usual, typically; as a rule; as often as not.
WordNet
adv. typically; "on average he watches three movies a week" [syn: on the average]
Usage examples of "on average".
No, those bars are the competing members of your own species, at least as cunning as you on average, forever shifting around so you can't pin them down, liable to get in your way without the least warning, disorienting your personal environment until you want to grab a gun or an axe and turn mucker.
The sort of people who go to such romps are on average too selfish to make parents.
Over this unimaginably (for humans) long time, each of the two lineages that branched from that remote ancestor has preserved 305 out of the 306 characters (on average: it could be that one lineage has preserved all 306 of them and the other has preserved 304).
The VQ-2 squadron would fly, on average, six to twelve missions per month against Israel and the Arab countries of the Middle East.
My own opinion is that on average people are better nourished than they used to be.