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diffuse

/dɪˈfjuːz/ · dif·fu·se
verb
  1. To spread over or through as in air, water, or other matter, especially by fluid motion or passive means. The scent of freshly baked cookies diffuses through the entire house.
  2. To be spread over or through as in air, water, or other matter, especially by fluid motion or passive means. Food coloring diffuses in water, creating a beautiful gradient effect.
adjective
  1. Spread out or dispersed over a wide area. The diffuse light of the setting sun casts a warm glow over the landscape.
Did you know? The word 'diffuse' is often used in scientific contexts to describe the spreading of particles or energy through a medium, such as the diffusion of heat or the diffusion of light.
Written by Lexi Wordsworth, Dictionary Editor 1 lookups Added Aug 15, 2026