noun (n)

• a homogeneous mixture of two or more substances; frequently (but not necessarily) a liquid solution(noun.substance)

  Example:
  He used a solution of peroxide and water.
  

  source: wordnet30
• a statement that solves a problem or explains how to solve the problem(noun.communication)

  Example:
  They were trying to find a peaceful solution.
  

  Synonym:
  answer, resolution, result, solvent
  

  source: wordnet30
• a method for solving a problem(noun.cognition)

  Example:
  The easy solution is to look it up in the handbook.
  

  source: wordnet30
• the set of values that give a true statement when substituted into an equation(noun.group)

  Synonym:
  root
  

  source: wordnet30
• the successful action of solving a problem(noun.act)

  Example:
  The solution took three hours.
  

  source: wordnet30
• The act of separating the parts of any body, or the condition of undergoing a separation of parts; disruption; breach.(noun)

  source: webster1913