- 1[transitive, intransitive] diffuse (something) (formal) to spread something or become spread widely in all directions The problem is how to diffuse power without creating anarchy. Technologies diffuse rapidly.
- 2[intransitive, transitive] diffuse (something) (technology) if a gas or liquid diffuses or is diffused in a substance, it becomes slowly mixed with that substance
- 3[transitive] diffuse something (formal) to make light shine less brightly by spreading it in many directions The moon was fuller than the night before, but the light was diffused by clouds.
- NAmE//dɪˈfyuʒn//noun [uncountable] the diffusion of Marxist ideas the rate of diffusion of a gas
NAmE//dɪˈfyuz//Verb Forms present simple I / you / we / they diffuse
he / she / it diffuses
past simple diffused
-ing form diffusing
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