Lewis & Short

oblīvĭōsus, a, um, adj. [oblivio].

  1. I. Lit., that easily forgets, forgetful, oblivious (rare but class.): hos (senes) significat credulos, obliviosos, Cic. Sen. 11, 36.
    Sup.: homo obliviosissimus, Tert. Anim. 24.
  2. II. Transf., that produces forgetfulness, oblivious (poet.): Massicus (i. e. sollicitudinum oblivionem afferens), Hor. C. 2, 7, 21.