Meaning 1 ►▼
When a batter hits the ball hard up the middle of the baseball field, allowing the batter to reach 1st base safely.
Derek Jeter hit a ball hard up the middle.
Meaning 2 ►▼
being aggressive and direct
“This wasn’t the time for compromise. With Trump and Cruz fighting for the nomination, Democrats and Obama should drive the ball hard up the middle and quit trying to be cute and clever.“ Principia in St. Louis