EFFUSE definition: to pour out or forth; shed; disseminate. See examples of effuse used in a sentence. Definition of Effuse Effuse can be used in various contexts, from describing the way liquid flows out of a container to expressing emotions without reservation. This word is often used to convey a sense of abundance or overflow. Examples of Effuse When a bottle is tipped over, the water will effuse out and spread across the table. There are three meanings listed in OED's entry for the adjective effuse. See ‘Meaning & use’ for definitions, usage, and quotation evidence. The meaning of EFFUSE is to pour out (a liquid). How to use effuse in a sentence. effuse (third-person singular simple present effuses, present participle effusing, simple past and past participle effused) (transitive) To emit; to give off. (figuratively) To gush; to be excitedly talkative and enthusiastic about something. (intransitive) To pour out like a stream or freely; to cause to exude; to shed. 5 meanings: (ɪˈfjuːz ) 1. to pour or flow out 2. to spread out; diffuse 3. to talk profusely, esp in an excited manner 4. to. Click for more definitions. Define effuse. effuse synonyms, effuse pronunciation, effuse translation, English dictionary definition of effuse. adj. Biology Spreading out loosely: an effuse thallus.