big gun

Definition

A large artillery gun or one of the largest-caliber naval guns (as on a battleship).

Example Sentences

• "London, Nov. 1: The big guns opened fire on Paris today at mid-day."
• "The smaller crew was possible because the battleship was stripped of all but her big guns."
• "The USS West Virginia became one of many symbols of American resolve. . . . Her big guns pounded the enemy at the battles of Leyte Gulf, Iwo Jima, and Okinawa."