Homonym: double-barrel (Shotgun)
A "double-barrel" typically refers to a type of firearm that has two parallel barrels, allowing it to fire two shots in quick succession. This design is often found in shotguns, which are used for hunting and sport shooting. The double-barrel configuration can be either side-by-side or over-and-under, depending on how the barrels are arranged.
In a broader context, "double-barrel" can also describe any situation or object that involves two components working together. For example, in marketing, a double-barrel approach might combine two strategies to achieve a more effective outcome. This term emphasizes the idea of dual functionality or impact.