noun (n)

• a multivalent nonmetallic element of the nitrogen family that occurs commonly in inorganic phosphate rocks and as organic phosphates in all living cells; is highly reactive and occurs in several allotropic forms(noun.substance)

  Synonym:
  atomic number 15, phosphorus
  

  source: wordnet30
• the 16th letter of the Roman alphabet(noun.communication)

  source: wordnet30