a pistol with a revolving cylinder (usually having six chambers for bullets)
"The detective carefully inspected the antique revolver to ensure its revolving cylinder was loaded and ready for action."
a door consisting of four orthogonal partitions that rotate about a central pivot; a door designed to equalize the air pressure in tall buildings
"The architect installed a revolving door at the lobby entrance to help balance the air pressure between the building's upper floors and ground level."
A handgun with a revolving chamber enabling several shots to be fired without reloading.
"The detective carefully examined the antique revolver before concluding it was likely the weapon used in the crime."