obtrusionEnglishOxford New American Dictionaryobtrusion /əbˈtro͞oZH(ə)n, əbˈtruʒ(ə)n / ▸ noun 1 the action of imposing on someone in an unwelcome or intrusive way: they do the job with the minimum of fuss and obtrusion [count noun] nosy personal obtrusions. 2 something that protrudes or projects outwards: a large obtrusion blocked his view obtrusions of igneous rock covered by sedimentary soils.