- an influential or important person or thing: He's a big gun in science.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
Examples from the Web for big gun
The war services were honeycombed with men who were big-gun experts.Our Army at the Front
Big-gun teaching is amusing; trigger-teaching is suggestive.
I am sure tens of thousands of rifle-cartridges were fired at them, and hundreds of rounds of big-gun shells.In the Russian Ranks
A nineteen-year-old big-gun pointer sits atop of his bicycle saddle, and the enemy fleet is swinging into range.The U-boat hunters
James B. Connolly
In big-gun teaching the teacher thinks; in trigger-teaching the teacher thinks how to get his scholars to think.
- informal an important or influential person
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012