gun
noun
\ ˈgən
\
\
Definition of gun
(Entry 1 of 2)
1a
: a piece of ordnance usually with high muzzle velocity and comparatively flat trajectory
b
: a portable firearm (such as a rifle or handgun)
c
: a device that throws a projectile
2a
: a discharge of a gun especially as a salute or signal
b
: a signal marking a beginning or ending
4
: something suggesting a gun in shape or function
5
: throttle
6
slang
: a person's arm
specifically
: an arm that has well-defined muscles
—usually plural Conor was spotted rowing away from The Loeb Boathouse in Central Park Saturday with his girlfriend, Dee Devlin, and their cute son, Conor Jr. The famous fighter showed off his guns while handling the oars for his crew. — TMZ.com The Heisman Trophy-winning and former NFL quarterback worked the stage the way he probably jabs through the weight room—whilst checking out his guns in the mirror … . — Tory Barron
under the gun
: under pressure or attack