ADJECTIVE (2)

1. excellent and delightful in all respects;
- Example: "an idyllic spot for a picnic"

2. suggestive of an idyll; charmingly simple and serene;
- Example: "his idyllic life in Tahiti"

The Collaborative International Dictionary of English v.0.48:

Idyllic \I*dyl"lic\, a.
   Of or belonging to idyls.
   [1913 Webster]

WordNet (r) 3.0 (2006):

idyllic
    adj 1: excellent and delightful in all respects; "an idyllic
           spot for a picnic"
    2: suggestive of an idyll; charmingly simple and serene; "his
       idyllic life in Tahiti"

Moby Thesaurus II by Grady Ward, 1.0:

55 Moby Thesaurus words for "idyllic":
   Alcaic, Anacreontic, Arcadian, Castalian, Edenic, Homeric,
   Hudibrastic, Pierian, Pindaric, Theocritean, at peace, bardic,
   bloodless, bucolic, calm, charming, concordant, didactic,
   dithyrambic, dramatic, eclogic, elegiac, epic, halcyon, heavenly,
   heroic, ideal, idealized, mock-heroic, narrative, orderly, pacific,
   pastoral, peaceable, peaceful, peacetime, picturesque, piping,
   poetic, poetico-mystical, poetico-mythological,
   poetico-philosophic, poetlike, quiet, restful, rhapsodic, runic,
   rustic, sapphic, serene, skaldic, soft, tranquil, unspoiled,
   untroubled