Etymology: (1350–1400; < L diffūsus, ptp. of diffundere to spread over, diffuse =dif-dif-+fundere to pour)
Definition of 'diffuse'
Princeton's WordNet
1. (adj)diffuse spread out; not concentrated in one place "a large diffuse organization"
2. (adj)soft, diffuse, diffused (of light) transmitted from a broadlightsource or reflected
3. (verb)diffuse lacking conciseness "a diffuse historical novel"
4. (verb)diffuse, spread, spread out, fan out move outward "The soldiers fanned out"
5. (verb)permeate, pervade, penetrate, interpenetrate, diffuse, imbue, riddle spread or diffuse through "An atmosphere of distrust has permeated this administration"; "music penetrated the entire building"; "His campaign was riddled with accusations and personal attacks"
6. (verb)circulate, circularize, circularise, distribute, disseminate, propagate, broadcast, spread, diffuse, disperse, pass around cause to become widely known "spread information"; "circulate a rumor"; "broadcast the news"
Definition of 'diffuse'
Webster Dictionary
1. (adj)diffuse 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
2. (verb)diffuse 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
3. (verb)diffuse to pass by spreading every way, to diffuse itself
Definitions of diffuse 
Afrikaans: versprei
Arabic: يَنْشُر
Bulgarian: разпространявам
Brazilian: difundir
Czech: rozptýlit (se)
German: zerstreuen
Danish: sprede; udbrede
Greek: διαχέω
Spanish: difundir(se)
Estonian: levitama
Farsi: پخش کردن؛ پراکنده کردن
Finnish: levitä
French: (se) diffuser, (se) répan
Hebrew: לְפָזֵר
Hindi: फैलाना, छितराना, फैला हुआ
Croatian: rasprostirati se,širiti s
Hungarian: áraszt
Indonesian: menyebar
Icelandic: dreifa
Italian: diffondere
Japanese: 広める
Korean: 퍼지게 하다
Lithuanian: sklisti, (iš)sklaidyti
Latvian: izplatīt; izplatīties; iz
Malay: menyebarkan
Dutch: (zich) verspreiden
Norwegian: spre (for alle vinder)
Polish: rozprzestrzeniać się
Persian: پخش کردن؛ پراکنده کردن
Pashto: شيندل، تيتول، خپرول: تيتې
Portuguese: difundir
Romanian: a (se) difuza, a (se) răs
Russian: распространять(ся)
Slovak: rozptýliť sa
Slovenian: razpršiti (se)
Serbian: rasprostirati se
Swedish: sprida[s], sprida sig
Thai: แพร่กระจาย
Turkish: yaymak
Taiwanese: 使擴散
Ukrainian: розповсюджувати; поширюва
Urdu: منتشر کرنا
Vietnamese: phổ biến
Chinese: 使扩散
