The Collaborative International Dictionary of English v.0.48:

Lamentable \Lam"en*ta*ble\, a. [L. lamentabilis: cf. F.
   lamentable.]
   1. Mourning; sorrowful; expressing grief; as, a lamentable
      countenance. [Archaic] "Lamentable eye." --Spenser.
      [1913 Webster]

   2. Fitted to awaken lament; to be lamented; sorrowful;
      pitiable; regrettable; unfortunate; as, a lamentable
      misfortune, or error. "Lamentable helplessness." --Burke.
      [1913 Webster]

   3. Miserable; pitiful; paltry; -- in a contemptuous or
      ridiculous sense. --Bp. Stillingfleet. --
      Lam"en*ta*ble*ness, n. -- Lam"en*ta*bly, adv.
      [1913 Webster]