Meaning & use
diffusion
The gradual spreading or mixing of particles, ideas, or substances from an area of high concentration to a lower one.
See it in a sentence
The diffusion of gas molecules across the room happened faster in the warm air.
Historians study the diffusion of agricultural techniques across ancient trade routes.
A note on using this word
In science, diffusion specifically describes movement driven by a concentration gradient, without any external force pushing the particles.
Words with a similar meaning
spreaddispersion
Choose a synonym to suit the sentence. Meanings can overlap without being identical.
Words with an opposite meaning
Make it your own
Write a sentence using “diffusion”, then compare your use with the examples above.
Your draft stays on this page and is not sent anywhere.