Wiktionary
n. (context cricket English) The number of runs conceded divided by the number of wickets taken, used as a statistic.
Wikipedia
The bowling average is one of a number of statistics used to compare bowlers in the sport of cricket. It is the ratio of runs conceded per wickets taken, meaning that the lower the bowling average is, the better the bowler is performing. The bowling average is commonly used alongside the economy rate and the strike rate to judge the overall performance of a bowler. Where a bowler has taken only a small number of wickets, their average can be artificially low, and an increase in wickets taken can result in large changes in their bowling average. Due to this, qualification caveats are generally applied to determine career records for bowling averages. After applying these criteria, George Lohmann holds the record for the lowest average in Test cricket, having claimed 112 wickets at an average of 10.75.
Usage examples of "bowling average".
On this calculation she fails by one to reach the der Linden record, but, even reckoning the two extra years she had to work in, since she made only a third of the other's essays, her bowling average may be said to be incomparably better.