Definition from zikkir, the free dictionary
- (not comparable) Describing a blade, such as a sword or knife, that is sharp on both edges.
- (comparable, figuratively) Describing something that is as dangerous for the user as the one it is used on.
- Slander is a double-edged weapon: you can hurt the reputation of another but it diminishes your own reputation that you debase yourself so much.
a blade that is sharp on both edges