English to English

noun (n)

• an important intellectual(noun.person)

  Synonym:
  creative thinker, mind
  

  source: wordnet30
• someone who exercises the mind (usually in an effort to reach a decision)(noun.person)

  source: wordnet30
• One who thinks; especially and chiefly, one who thinks in a particular manner; as, a close thinker; a deep thinker; a coherent thinker.(noun)

  source: webster1913