Home›Browse›M›middle linebackermiddle linebackerOur editors are putting together more complete content — check back in about 20 minutesmiddle linebackermiddle linebacker — nounnoun1. a defensive player in American football who lines up in the middle of the lineba1.nounDefinitiona defensive player in American football who lines up in the middle of the linebackersExampleThe middle linebacker called out the defensive signals before the snap.