Definition of "diffuse"

diffuse¹

/dɪˈfjuːz/

verb
third-person singular simple present diffuses, present participle diffusing, simple past and past participle diffused
1. (transitive) To spread over or through as in air, water, or other matter, especially by fluid motion or passive means.
  Quotations
  We do not know by whom the insufficiency of the year of 365 days was first discovered; we find this knowledge diffused among all civilized nations, and various artifices used in making the correction.
  1837, William Whewell, “Earliest Stages of Astronomy”, in History of the Inductive Sciences, from the Earliest to the Present Times. […], volume I, London: John W[illiam] Parker, […]; Cambridge, Cambridgeshire: J. and J. J. Deighton, book III (History of Greek Astronomy), section 3 (Correction of the Civil Year. (Julian Calendar.)), page 121
2. (intransitive) To be spread over or through as in air, water, or other matter, especially by fluid motion or passive means.

diffuse²

/dɪˈfjuːs/

adjective
comparative more diffuse, superlative most diffuse
1. Everywhere or throughout everything; not focused or concentrated.
2. Wordy; verbose.