Definition
Diffusion is the process where something spreads out widely, like information or a scent. Imagine spraying air freshener; the smell doesn't stay in one spot but disperses throughout the room. It's about moving from an area of high concentration to low concentration until everything is evenly distributed. Think of it as the opposite of containment, where you keep something in one place. Diffusion can also describe how ideas or trends spread through a population. It's like osmosis, but without a membrane!