1. To remain a guest in a place, especially someone's home, for too long, to the point where the host no longer wishes one to stay. After the cool reception I received at breakfast, it was apparent that I had outstayed my welcome at the cottage of my father's friend.

2. By extension, to have one's presence become unwanted in a particular environment. The polls make it clear that this candidate has outstayed her welcome in this primary race. Though wildly popular for a short time, the product simply outstayed its welcome in the market, and can now be found in bargain bins everywhere.