When you bite into something crunchy, its brittleness makes a distinct, crisp sound. There's nothing like munching your way through a bag of crunchy potato chips.
There's a delightful crispness to crunchy things, whether you're eating raw carrots, tortilla chips, or toasted almonds. While most crunchy items are edible, you can also use the word to describe things that make a similar crisp, crackling sound — think of jumping into a pile of crunchy leaves. An informal meaning, "environmentally liberal" or "hippie," comes from the phrase "crunchy granola" and the implication that nature lovers enjoy healthy foods like granola.