1.
Threadbare clothes, carpets, and other pieces of cloth look old, dull, and very thin, because they have been worn or used too much.
She sat cross-legged on a square of ~ carpet.
= worn
ADJ
2.
If you describe an activity, an idea, or an argument as ~, you mean that it is very weak, or inadequate, or old and no longer interesting.
...the government’s ~ domestic policies.
ADJ