Etymology
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RBI (n.)

also R.B.I., in baseball, 1947, short for run batted in.

updated on June 03, 2013

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Definitions of RBI from WordNet

rbi (n.)
a run that is the result of the batter's performance;
he had more than 100 rbi last season
Synonyms: run batted in
From wordnet.princeton.edu, not affiliated with etymonline.