- dif|fuse1 [ dı`fjuz ] verb1. ) intransitive or transitive TECHNICAL if something diffuses through something, it spreads through it:Light gases diffuse through porous surfaces more rapidly than heavy gases.a ) if light diffuses, or something diffuses it, it shines over a large area but not very brightly2. ) transitive FORMAL to spread something such as information, ideas, or power among a large group of people╾ dif|fu|sion / dI`fjuZn / noun uncountdiffusedif|fuse 2 [ dı`fjus ] adjective FORMAL1. ) existing over a large area or in many areas2. ) using too many words and not easy to understand
Usage of the words and phrases in modern English. 2013.