a cover for the open part of a pot, box, or other container
dustbin/saucepan etc lid
the name on the coffin lid
He carefully lifted the lid of the box.
to control a situation very carefully, especially so that it does not cause problems:
keeping the lid on inflation
Kline keeps a very tight lid on his private life.
to do something that finally stops something or ruins or ends someone's plans or hopes:
Let's put a lid on all these rumours.
5 also lift the lid on something
to let people know the true facts about a bad or shocking situation:
a documentary that takes the lid off the world of organized crime