noun (n)

• special importance or significance(noun.state)

  Example:
  The red light gave the central figure increased emphasis.
  

  Synonym:
  accent
  

  source: wordnet30
• intensity or forcefulness of expression(noun.attribute)

  Example:
  His emphasis on civil rights.
  

  Synonym:
  vehemence
  

  source: wordnet30
• special and significant stress by means of position or repetition e.g.(noun.communication)

  source: wordnet30
• the relative prominence of a syllable or musical note (especially with regard to stress or pitch)(noun.communication)

  Synonym:
  accent, stress
  

  source: wordnet30
• A particular stress of utterance, or force of voice, given in reading and speaking to one or more words whose signification the speaker intends to impress specially upon his audience.(noun)

  source: webster1913