WordNet (r) 3.0 (2006):

sweet basil
    n 1: annual or perennial of tropical Asia having spikes of small
         white flowers and aromatic leaves; one of the most
         important culinary herbs; used in salads, casseroles,
         sauces and some liqueurs [syn: common basil, sweet
         basil, Ocimum basilicum]
    2: leaves of the common basil; used fresh or dried [syn:
       basil, sweet basil]