1.  batting average(n = noun.linkdef) hitting average - (baseball) a measure of a batter's performance; the number of base hits divided by the number of official times at bat; "Ted Williams once had a batting average above .400"
is a kind of average

2.  batting average(n = noun.linkdef) - (an extension of the baseball term) the proportion of times some effort succeeds; "the salesman's batting average was 7 out of 12"
is a kind of proportion

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