Dif*fuse" (?), v. t. [imp. & p. p. Diffused (?); p. pr. & vb. n. Diffusing.] [L. diffusus, p. p. of diffundere to pour out, to diffuse; dif- = dis- + fundere to pour. See Fuse to melt.] To pour out and cause to spread, as a fluid; to cause to flow on all sides; to send out, or extend, in all directions; to spread; to circulate; to disseminate; to scatter; as to diffuse information.

Thence diffuse
His good to worlds and ages infinite.

We find this knowledge diffused among all civilized nations.

Syn. -- To expand; spread; circulate; extend; scatter; disperse; publish; proclaim.

Dif*fuse", v. i. To pass by spreading every way, to diffuse itself.

Dif*fuse" (?), a. [L. diffusus, p. p.] Poured out; widely spread; not restrained; copious; full; esp., of style, opposed to concise or terse; verbose; prolix; as, a diffuse style; a diffuse writer.

A diffuse and various knowledge of divine and human things.

Syn. -- Prolix; verbose; wide; copious; full. See Prolix.

• To spread over or through as in air, water, or other matter, especially by fluid motion or passive means.
       Food coloring diffuses in water
  
• Everywhere or throughout everything; not focused or concentrated.
       Such a diffuse effort is unlikely to produce good results.