A serrated edge is a wavy or jagged edge on a knife or tool, which helps it cut better by gripping and tearing through things more easily. Full definition
Measure 3/4» Plastic CoinsHigh - quality coins with serrated edges accurately portray real money. (hand2mind.com)
It's a delicate, naked offering that flits between mournful vocals, processed backward synths and serrated edges of what sounds like guitar distortion. (metacritic.com)
Sometimes there's kelp, and that's not very fun because there's a little serrated edge on the kelp that doesn't feel very pleasant. (canadianbusiness.com)