American Heritage Dictionary
(1)
Century Dictionary
(3)
GNU Webster's 1913
(1)
WordNet
(1)
Elsewhere on the web
You might argue that being traded for the bats is the reason he killed himself, but I don't think it was (nor do I think anyone can really say for certain why he did).— Original Signal - Transmitting Buzz
Lewis struck out 124 times in 468 at-bats, which isn't especially egregious, but 40\% of those strikeouts were looking.— McCovey Chronicles
Major League hitters strike out in 20\% of at bats and hit homeruns in 3\% of at bats, meaning that to truly understand the true talent level (and therefore project performance) of a hitter, figuring out the other 77\% of at-bats is very important.— The Good Phight
Doolittle is hitting .368 / .454 / .693 with 12 homers in 163 at-bats, which isn't bad for a player who was supposed to be more Paul Konerko.— Baseball Analysts

American Heritage Dictionary (1)
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You can expect to see this word about twice a week.