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WordReference Random House Learner's Dictionary of American English © 2024dif•fuse /v. dɪˈfyuz; adj. -ˈfyus/USA pronunciation v., -fused, -fusing, adj. v. - to (cause to) spread or scatter widely: [no object]The light diffused into the room.[~ + object]Diffuse the light in your room to avoid glare.
- Physics to spread out freely without restriction;
disseminate:[~ + object]The printing press helped diffuse knowledge.
adj. - widely spread or scattered;
dispersed:The room was bathed in soft, diffuse light. - characterized by wordiness in speech or writing;
disjointed:I got lost in your rather diffuse essay.
dif•fuse•ly /dɪˈfyusli/USA pronunciation adv. dif•fuse•ness, n. [uncountable] dif•fu•sion /dɪˈfyuʒən/USA pronunciation n. [uncountable]diffusion of gases into the atmosphere. dif•fu•sive /dɪˈfyusɪv/USA pronunciation adj. See -fus-. WordReference Random House Unabridged Dictionary of American English © 2024dif•fuse (v. di fyo̅o̅z′;adj. di fyo̅o̅s′),USA pronunciation v., -fused, -fusing, adj. v.t. - to pour out and spread, as a fluid.
- to spread or scatter widely or thinly;
disseminate. - Physicsto spread by diffusion.
v.i. - to spread.
- Physicsto intermingle by diffusion.
adj. - characterized by great length or discursiveness in speech or writing;
wordy. - widely spread or scattered;
dispersed. - Botanywidely or loosely spreading.
- Optics(of reflected light) scattered, as from a rough surface (opposed to specular).
- Latin diffūsus spread, poured forth. See dif-, fuse2
- Anglo-French)
- Middle English (1350–1400
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