noun (n)

• the act of removing floating material from the surface of a liquid(noun.act)

  source: wordnet30
• reading or glancing through quickly(noun.communication)

  Synonym:
  skim
  

  source: wordnet30
• failure to declare income in order to avoid paying taxes on it(noun.act)

  source: wordnet30
• the act of brushing against while passing(noun.act)

  Synonym:
  grazing, shaving
  

  source: wordnet30
• The act of one who skims.(noun)

  source: webster1913