the world > matter > condition of matter > bad condition of matter > [adjective] > having lost freshness > stale (4)
That has lost its freshness; altered by keeping. of food or drink.
figurative. Decrepit; outmoded, antiquated. Obsolete.
That has lost its freshness; altered by keeping. of urine, manure, straw, etc.
Stale, flat, that has lost its freshness; tainted.