noun (n)

• an alert cognitive state in which you are aware of yourself and your situation(noun.cognition)

  Example:
  He lost consciousness.
  

  Antonym:
  unconsciousness
  

  source: wordnet30
• having knowledge of(noun.cognition)

  Example:
  His sudden consciousness of the problem he faced.
  

  Synonym:
  awareness, cognisance, cognizance, knowingness
  Antonym:
  incognizance
  

  source: wordnet30
• The state of being conscious; knowledge of one's own existence, condition, sensations, mental operations, acts, etc.(noun)

  source: webster1913