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Definition of obsolete:

  1. No longer in use; gone into disuse; disused; neglected; as, an obsolete word; an obsolete statute; - applied chiefly to words, writings, or observances.
  2. Not very distinct; obscure; rudimental; imperfectly developed; abortive.
  3. To become obsolete; to go out of use.


Noachian, dated, mossy, obsolescent, moth-eaten, study at old, out, archaic, on the shelf, old-fashioned, neolithic, superseded, in mothballs, old-time, prehistoric, démodé, out-of-date, new, used, ancient, fossilized, rare, old, low-tech, outdated, outmoded, passé, demoded, disused, medieval, kaput, Stone Age, primitive, old-world, noncurrent, antiquated, outworn, superannuated, moribund.

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