Meaning of DIFFUSE in English

I. də̇ˈfyüs adjective

Etymology: Middle English, from Middle French or Latin; Middle French difus scattered, spread out, from Latin diffusus, past participle of diffundere to spread out, pour out, scatter, from dif- (from dis- ) + fundere to pour — more at found

1. obsolete

a. : confused

b. : hard to understand : difficult

2. : poured or spread out : widespread : not concentrated or restrained : copious , full

3. : verbose , prolix

a diffuse writer

4. : spreading widely or loosely

diffuse branches

5. : not localized : scattered

diffuse sclerosis

6. : moving in many directions

diffuse radiation

7. : having the whole chorionic surface studded with villi

whales and horses have diffuse placentas

Synonyms: see wordy

II. də̇ˈfyüz sometimes dīˈ- verb

( -ed/-ing/-s )

Etymology: Middle French or Latin; Middle French diffuser, from Latin diffusus, past participle

transitive verb


a. : to pour out and permit or cause to spread freely (as a fluid out of a container)

a drop of dye diffused through water

gas being diffused through the air

: spread out : permit to spread over a wide area or through a large space

the all-pervasive spirit of sweetness and light diffused through the universe — V.L.Parrington

b. : to make widely perceptible, known, or familiar : send out : extend , scatter , broadcast

in place of the present chaos universities must again diffuse a definite culture — Walter Moberly

c. : to spread out into many areas, spheres, agencies, and activities often with consequent reduced concentration or effectiveness

a state in which power is concentrated will … be more bellicose than one in which power is diffused — Bertrand Russell

it is like dynamite exploded in the open. Its force is diffused by going in all directions — Saturday Review

2. : to subject (as a light beam) to diffusion : treat by diffusion

3. : to break up and distribute (incident light) by reflection (as from a rough surface)

intransitive verb

1. : to spread out : pass or become transmitted often with slow tingeing or permeation

culture traits are able to diffuse apart from the migration of peoples — Brewton Berry

2. : to undergo diffusion

a gas in solution diffuses from a region of greater to one of less concentration

Synonyms: see spread

Webster's New International English Dictionary.      Новый международный словарь английского языка Webster.