The Collaborative International Dictionary of English v.0.48:

Lovage \Lov"age\, n. [F. liv[`e]che, fr. L. levisticum,
   ligusticum, a plant indigenous to Liguria, lovage, from
   Ligusticus Ligustine, Ligurian, Liguria a country of
   Cisalpine Gaul.] (Bot.)
   An umbelliferous plant (Levisticum officinale), sometimes
   used in medicine as an aromatic stimulant.
   [1913 Webster]

WordNet (r) 3.0 (2006):

lovage
    n 1: herb native to southern Europe; cultivated for its edible
         stalks and foliage and seeds [syn: lovage, Levisticum
         officinale]
    2: stalks eaten like celery or candied like angelica; seeds used
       for flavoring or pickled like capers