obtrusionEnglishOxford Dictionary of Englishobtrusion /əbˈtruːʒn / ▸ noun 1 [mass noun] 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 [count noun] something that protrudes or projects outwards: a large obtrusion blocked his view obtrusions of igneous rock covered by sedimentary soils.