noun, verb
noun a small white ball made of a chemical with a strong smell, used for keeping moths away from clothes
IDIOMS
in mothballs stored and not in use, often for a long time:
The plan has been put in mothballs.
verb [VN] [usuallypassive] to decide not to use or develop sth, for a period of time, especially a piece of equipment or a plan:
The original proposal had been mothballed years ago.
