The Collaborative International Dictionary of English v.0.48:

Languish \Lan"guish\, v. i. [imp. & p. p. Languished; p. pr. &
   vb. n. Languishing.] [OE. languishen, languissen, F.
   languir, L. languere; cf. Gr. ? to slacken, ? slack, Icel.
   lakra to lag behind; prob. akin to E. lag, lax, and perh. to
   E. slack. See -ish.]
   1. To become languid or weak; to lose strength or animation;
      to be or become dull, feeble or spiritless; to pine away;
      to linger in a weak or deteriorating condition; to wither
      or fade.
      [1913 Webster]

            We . . . do languish of such diseases. --2 Esdras
                                                  viii. 31.
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            Cease, fond nature, cease thy strife,
            And let me languish into life.        --Pope.
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            For the fields of Heshbon languish.   --Is. xvi. 8.
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   2. To assume an expression of weariness or tender grief,
      appealing for sympathy. --Tennyson.

   3. To be neglected and unattended to; as, the proposal
      languished on the director's desk for months.
      [PJC]

   Syn: To pine; wither; fade; droop; faint.
        [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Languishing \Lan"guish*ing\, a.
   1. Becoming languid and weak; pining; losing health and
      strength.
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   2. Amorously pensive; indicating melancholy; as, languishing
      eyes, or look.
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   3. Suffering neglect; neglected.
      [PJC]

   4. Continuing in a weak or deteriorating state; lingering.
      [PJC]