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Meaning of obsolescent

ob•so•les•cent

Pronunciation: (ob"su-les'unt), [key]
— adj.
  1. becoming obsolete; passing out of use, as a word: an obsolescent term.
  2. becoming outdated or outmoded, as machinery or weapons.
  3. gradually disappearing or imperfectly developed, as vestigial organs.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.
See also:
obsolescence obsolete