The Collaborative International Dictionary of English v.0.48:

Ladylike \La"dy*like`\, a.
   1. Like a lady in appearance or manners; well-bred.
      [1913 Webster]

            She was ladylike, too, after the manner of the
            feminine gentility of those days.     --Hawthorne.
      [1913 Webster]

   2. Becoming or suitable to a lady; as, ladylike manners.
      "With fingers ladylike." --Warner.
      [1913 Webster]

   3. Delicate; tender; feeble; effeminate.
      [1913 Webster]

            Too ladylike a long fatigue to bear.  --Dryden.
      [1913 Webster]

WordNet (r) 3.0 (2006):

ladylike
    adj 1: befitting a woman of good breeding; "ladylike manners"

Moby Thesaurus II by Grady Ward, 1.0:

59 Moby Thesaurus words for "ladylike":
   aristocratic, chivalrous, correct, courteous, courtly, cultivated,
   cultured, decorous, dignified, distaff, ducal, elegant, exalted,
   female, feminine, genteel, gentle, gentlemanlike, gentlemanly,
   gentlewomanlike, girlish, gracious, gynecic, gynecoid, gynic, high,
   highbred, kinglike, kingly, kittenish, knightly, little-girlish,
   maidenly, mannerly, matronal, matronlike, matronly, muliebral,
   noble, of gentle blood, of rank, patrician, petticoat, polished,
   polite, princelike, princely, proper, queenlike, queenly,
   quite the lady, refined, respectable, titled, well-bred,
   well-brought-up, womanish, womanlike, womanly