What is the meaning of replication?

noun

• The act of making copies.
  • usage: "Gutenberg's reproduction of holy texts was far more efficient"
  • synonyms: reproduction
• Genetics) the process whereby DNA makes a copy of itself before cell division. (
• A quick reply to a question or remark (especially a witty or critical one. )
  • usage: "it brought a sharp rejoinder from the teacher"
  • synonyms: rejoinder, retort, return, riposte, comeback, counter
• Law) a pleading made by a plaintiff in reply to the defendant's plea or answer. (
• The repetition of a sound resulting from reflection of the sound waves.
  • usage: "she could hear echoes of her own footsteps"
  • synonyms: echo, reverberation, sound reflection
• Copy that is not the original; something that has been copied.
  • synonyms: replica, reproduction
• The repetition of an experiment in order to test the validity of its conclusion.
  • usage: "scientists will not believe an experimental result until they have seen at least one replication"