noun (n)

• 1/60 of a minute; the basic unit of time adopted under the Systeme International d'Unites(noun.time)

  Synonym:
  sec, second
  

  source: wordnet30
• an abundant tasteless odorless multivalent nonmetallic element; best known in yellow crystals; occurs in many sulphide and sulphate minerals and even in native form (especially in volcanic regions)(noun.substance)

  Synonym:
  atomic number 16, sulfur, sulphur
  

  source: wordnet30
• the cardinal compass point that is at 180 degrees(noun.linkdef)

  Synonym:
  due south, south, southward
  

  source: wordnet30
• a unit of conductance equal to the reciprocal of an ohm(noun.quantity)

  Synonym:
  mho, reciprocal ohm, siemens
  

  source: wordnet30
• the 19th letter of the Roman alphabet(noun.communication)

  source: wordnet30
• (thermodynamics) a thermodynamic quantity representing the amount of energy in a system that is no longer available for doing mechanical work(noun.attribute)

  Example:
  Entropy increaSeS aS matter and energy in the univerSe degrade to an ultimate State of inert uniformity.
  

  Synonym:
  entropy, randomness
  

  source: wordnet30