Merriam-Webster Collegiate Dictionary - lid

 I. noun  Etymology: Middle English, from Old English h~; akin to Old High German hlit cover, and probably to Old English hlinian to lean — more at lean  Date: before 12th century  1. a movable cover for the opening of a hollow container (as a vessel or box)  2. eye~  3. the operculum in mosses  4. slang hat  5. something that confines, limits, or suppresses ; check, restraint  6. an ounce of marijuana  II. transitive verb  (~ded; ~ding)  Date: 13th century to cover or supply with a ~