1. dill (Anethum graveolens (the type species of the genus Anethum), a herb, the seeds of which are moderately warming, pungent, and aromatic, formerly used as a soothing medicine for children; also known as dillseed)

2. some kind of plant (Biblical)

3. emery (geology)

4. mythical stone, or possibly worm, that could cut through or disintegrate any substance it came in contact with, adamant (mythology)