worn-out

1. Worn or used until no longer usable or effective.
2. Thoroughly exhausted; spent.

adjective

1. Without freshness or appeal because of overuse: banal, bromidic, clichéd, commonplace, corny, hackneyed, musty, overused, overworked, platitudinal, platitudinous, shopworn, stale, stereotyped, stereotypic, stereotypical, threadbare, timeworn, tired, trite, warmed-over, well-worn. See excite/bore/interest, usual/unusual.
2. Extremely tired: bleary, dead, drained, exhausted, fatigued, rundown, spent, tired out, wearied, weariful, weary, worn-down. Informal beat, bushed, tuckered (out). Slang done in, fagged (out), pooped (out). Idioms: all in, ready to drop. See health/sickness, tired/fresh.

The adjective has 2 meanings:

Meaning #1: worn until no longer useful
  Synonym: raddled

Meaning #2: drained of energy or effectiveness; extremely tired; completely exhausted
  Synonyms: exhausted, dog-tired, fagged, fatigued, played out, spent, washed-out, worn out