WordReference Random House Unabridged Dictionary of American English © 2020
batting av′erage, 
  1. Sport[Baseball.]a measure of the batting ability of a player, obtained by dividing the number of base hits by the number of official times at bat and carrying out the result to three decimal places. A player with 100 base hits in 300 times at bat has a batting average of 0.333.
  2. [Informal.]a degree of achievement or accomplishment in any activity.
  • 1865–70, American.

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