Wiktionary
n. 1 (context cricket English) A statistical estimation of the scoring ability of a batsman; equal to the total number of runs scored divided by the number of times out. 2 (context baseball English) A statistical estimation of the hitting ability of a batter; equal to the number of hits divided by the number of official at-bats. Normally expressed as a real number instead of an average despite the name.
WordNet
n. (baseball) the percentage of times a batter gets a hit; number of base hits divided by the number of times at bat
(an extension of the baseball term) the proportion of times some effort succeeds; "the salesman's batting average was 7 out of 12"
Wikipedia
Usage examples of "batting average".
The batter's name appeared on the Scoreboard as Babe Fujiwara and his batting average stood at a whopping .
If the human race has learned anything from history, it is that peace treaties do not do a thing for either world peace or for Ted Williams's batting average.
Reiser, the center fielder nonpareil of the '40s and '50s, the man who had made the most hits, scored the most runs, and compiled the highest batting average in history, took a ragamuffin team that had finished last in 1968 and led them to first place with a miraculous combination of managerial insight and inspiration.
Had they paid a hundred extra New Yen for the old baseball stats to be installed in their neuroplants, so that they could tell you, as he could, George Shuba's batting average in 1953, or Tiamo Victor's ERA in 2089?
Not a tremendous batting average for so lusty a liege, but then none of us had proved excessively fertile either.
It was simply that his batting average on judgment was so high that it was pretty dependable.