What does diffusion mean?
Diffusion is the process of “diffusing,” meaning to “spread out” or “disperse.” In science, “diffusion” refers to how particles in gases and liquids naturally “spread out.”
A hot gas will diffuse more quickly than a cold one.
It can be tricky deciding whether diffuse or defuse is the right word; use “diffuse” if you mean “spread out.”
QuillBot’s free Paraphraser will help you to find alternative ways of expressing “diffusion” in your specific context.