Dill, (Anethum graveolens), an annual or biennial herb of the parsley family (Apiaceae) and its dry fruit and leaves which are used to season foods. Native to Mediterranean countries and southeastern Europe, dill is now widely cultivated in Europe, India, and North America. The cultivated plant has stalks with finely divided leaves composed of many gments. The leaves are borne alternately along the stalks and are sheathed at the base. The cultivated plant has stalks with finely divided leaves composed of many gments. The leaves are borne alternately along the stalks and are sheathed at the base.