ob·trude / əbˈtroōd/ • v. [intr.] become noticeable in an unwelcome or intrusive way: a sound from the reception hall obtruded into his thoughts. ∎ [tr.] impose or force (something) on someone in such a way: I felt unable to obtrude my private sorrow upon anyone.DERIVATIVES: ob·trud·er n.ob·tru·sion / -ˈtroōzhən/ n.