noun (n)

• the act of making copies(noun.act)

  Synonym:
  reproduction
  

  source: wordnet30
• (genetics) the process whereby DNA makes a copy of itself before cell division(noun.process)

  source: wordnet30
• a quick reply to a question or remark (especially a witty or critical one)(noun.communication)

  Synonym:
  comeback, counter, rejoinder, retort, return, riposte
  

  source: wordnet30
• (law) a pleading made by a plaintiff in reply to the defendant's plea or answer(noun.communication)

  source: wordnet30
• the repetition of a sound resulting from reflection of the sound waves(noun.attribute)

  Synonym:
  echo, reverberation, sound reflection
  

  source: wordnet30
• copy that is not the original; something that has been copied(noun.artifact)

  Synonym:
  replica, reproduction
  

  source: wordnet30
• the repetition of an experiment in order to test the validity of its conclusion(noun.act)

  Example:
  Scientists will not believe an experimental result until they have seen at least one replication.
  

  source: wordnet30
• An answer; a reply.(noun)

  source: webster1913