Longman Dictionary of Contemporary English
Wiktionary
damaged and useless due to hard or continued use. v
(past participle of wear out English)
WordNet
adj. drained of energy or effectiveness; extremely tired; completely exhausted; "the day's shopping left her exhausted"; "he went to bed dog-tired"; "was fagged and sweaty"; "the trembling of his played out limbs"; "felt completely washed-out"; "only worn-out horses and cattle"; "you look worn out" [syn: exhausted, dog-tired, fagged, fatigued, played out, spent, washed-out, worn-out(a), worn out(p)]
Usage examples of "worn out".
He would stay away, for a week or a fortnight, until we had half forgotten his existence, and he always came back so terribly ill and worn out that he could hardly drag himself along, or unlock his door.
He was worn out and sated to a level he wouldn't have thought possible.
Why, but for him, Lady Marjory, you might have worn out months of your life in prison, and have been compelled at last to wed your cousin.
Warren sits astride an intersection of a two-lane state highway and a worn out county road where they come together just six miles off I-75.