Home›Browse›I›infield flyinfield flyOur editors are putting together more complete content — check back in about 20 minutesinfield flyinfield fly — nounnoun1. a rule in baseball that protects runners from double plays on easy fly balls1.nounDefinitiona rule in baseball that protects runners from double plays on easy fly ballsExampleThe umpire called an infield fly, so the batter was out automatically.