The Collaborative International Dictionary of English v.0.48:

Aromatic \Ar`o*mat"ic\, Aromatical \Ar`o*mat"ic*al\, a. [L.
   aromaticus, Gr. ?: cf. F. aromatique. See Aroma.]
   Pertaining to, or containing, aroma; fragrant; spicy;
   strong-scented; odoriferous; as, aromatic balsam.
   [1913 Webster]

   Aromatic compound (Chem.), one of a large class of organic
      substances, as the oils of bitter almonds, wintergreen,
      and turpentine, the balsams, camphors, etc., many of which
      have an aromatic odor. They include many of the most
      important of the carbon compounds and may all be derived
      from the benzene group, C6H6. The term is extended also
      to many of their derivatives.

   Aromatic vinegar. See under Vinegar.
      [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Aromatic \Ar`o*mat"ic\ ([a^]r`[-o]*m[a^]t"[i^]k), n.
   A plant, drug, or medicine, characterized by a fragrant
   smell, and usually by a warm, pungent taste, as ginger,
   cinnamon, spices.
   [1913 Webster]

WordNet (r) 3.0 (2006):

aromatic
    adj 1: (chemistry) of or relating to or containing one or more
           benzene rings; "an aromatic organic compound"
    2: having a strong pleasant odor; "the pine woods were more
       redolent"- Jean Stafford [syn: aromatic, redolent]

Moby Thesaurus II by Grady Ward, 1.0:

30 Moby Thesaurus words for "aromatic":
   ambrosial, balmy, effluvious, essenced, flowery, fragrant, fruity,
   incense-breathing, malodorous, musky, odorant, odorate, odored,
   odoriferous, odorous, perfumed, perfumy, pungent, redolent, savory,
   scented, smellful, smelling, smellsome, smelly, spicy, sweet,
   sweet-scented, sweet-smelling, thuriferous