1. An aromatic herb (Anethum graveolens) native to Eurasia, having finely dissected leaves and small yellow flowers clustered in umbels.
2. The leaves or seeds of this plant, used as a seasoning.

[Middle English dile, from Old English.]

The American Heritage® Dictionary of the English Language, Fourth Edition Copyright © 2007, 2000 by Houghton Mifflin Company. Updated in 2009. Published by Houghton Mifflin Company. All rights reserved.