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]

Moby Thesaurus II by Grady Ward, 1.0:

102 Moby Thesaurus words for "darling":
   admired, adorable, adored, alluring, ambrosial, angel, attractive,
   babe, baby, baby-doll, bairn, beloved, beloved object, bewitching,
   buttercup, charming, cherished, cherub, chick, chickabiddy, child,
   chit, cosset, crush, dear, dear one, dearly beloved, deary,
   delectable, delicious, doll, duck, duckling, enchanting, engaging,
   esteemed, favorite, fetching, flame, fondling, heavenly, held dear,
   hon, honey, honey bunch, honey child, idol, innocent, jewel, kid,
   kitten, lamb, lambkin, light of love, little bugger, little fellow,
   little guy, little innocent, little one, little tad, little tot,
   love, loved, loved one, lovely, lover, luscious, lush,
   matinee idol, minion, mite, nipper, offspring, peewee, pet,
   petkins, pleasing, popular, precious, precious heart, preference,
   prized, revered, scrumptious, shaver, snookums, spoiled child,
   sugar, sweet, sweetheart, sweetie, sweetkins, sweets, tad, tot,
   treasured, truelove, wee tot, well-beloved, well-liked,
   white-haired, yummy



Easton's 1897 Bible Dictionary:

Darling
   Ps. 22:20; 35:17) means an "only one."