The Collaborative International Dictionary of English v.0.48:

darling \dar"ling\, n. [OE. derling, deorling, AS. de['o]rling;
   de['o]re dear + -ling. See Dear, and -ling.]
   One dearly beloved; a favorite.
   [1913 Webster]

         And can do naught but wail her darling's loss. --Shak.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

darling \dar"ling\, a.
   Dearly beloved; regarded with especial kindness and
   tenderness; favorite. "Some darling science." --I. Watts.
   "Darling sin." --Macaulay.
   [1913 Webster]

WordNet (r) 3.0 (2006):

darling
    adj 1: dearly loved [syn: beloved, darling, dear]
    n 1: a special loved one [syn: darling, favorite,
         favourite, pet, dearie, deary, ducky]
    2: an Australian river; tributary of the Murray River [syn:
       Darling, Darling River]