noun (n)

• the third canonical hour; about 9 a.m.(noun.time)

  Synonym:
  terce
  

  source: wordnet30
• the cardinal number that is the sum of one and one and one(noun.quantity)

  Synonym:
  3, deuce-ace, iii, leash, tercet, ternary, ternion, terzetto, three, threesome, trey, triad, trine, trinity, trio, triplet, troika
  

  source: wordnet30
• one of three equal parts of a divisible whole(noun.quantity)

  Synonym:
  one-third, third
  

  source: wordnet30
• A cask whose content is one third of a pipe; that is, forty-two wine gallons; also, a liquid measure of forty-two wine, or thirty-five imperial, gallons.(noun)

  source: webster1913