nounpl. lu·lav·im or lu·lavs
- A bundle containing a palm frond, two willow branches, and three myrtle branches that is ceremonially waved during the celebration of Sukkot.
- The palm frond from such a bundle.
Origin of lulavMishnaic Hebrew lûlab, sprout, palm branch, from libl&emacron;b, to bloom; see lblb in Semitic roots.