/un led"id/ , adj.
1. (of gasoline) containing no tetraethyllead; lead-free.
2. Print. not separated or spaced with leads, as lines of type or printed matter.
n.
3. an unleaded product, esp. gasoline that contains no tetraethyllead.
[ 1605-15; UN- 1 + LEAD 2 + -ED 3 ]