English to English

noun (n)

• the amount by which something decreases(noun.attribute)

  Synonym:
  decrease
  Antonym:
  increase, increment
  

  source: wordnet30
• a process of becoming smaller or shorter(noun.process)

  Antonym:
  growth, increase, increment
  

  source: wordnet30
• The state of becoming gradually less; decrease; diminution; waste; loss.(noun)

  source: webster1913