noun (n)

• something (as a course of action) that is recommended as advisable(noun.communication)

  source: wordnet30
• something that recommends (or expresses commendation of) a person or thing as worthy or desirable(noun.communication)

  Synonym:
  good word, testimonial
  

  source: wordnet30
• any quality or characteristic that gains a person a favorable reception or acceptance or admission(noun.attribute)

  Example:
  Her pleasant personality is already a recommendation.
  

  Synonym:
  passport
  

  source: wordnet30
• The act of recommending.(noun)

  source: webster1913