noun (n)

• (computer science) a single execution of a set of instructions that are to be repeated(noun.process)

  Example:
  The solution took hundreds of iterations.
  

  Synonym:
  loop
  

  source: wordnet30
• (computer science) executing the same set of instructions a given number of times or until a specified result is obtained(noun.process)

  Example:
  The solution is obtained by iteration.
  

  Synonym:
  looping
  

  source: wordnet30
• doing or saying again; a repeated performance(noun.act)

  source: wordnet30
• Recital or performance a second time; repetition.(noun)

  source: webster1913