noun

• (uncountable) A heavy yellow elemental metal of great value, with atomic number 79 and symbol Au.
  "You like to hear about gold. A king filled his prison room As full as the room could hold To the top of his reach on the wall With every known shape of the stuff. ’Twas to buy himself off his doom."
• (countable or uncountable) A coin or coinage made of this material, or supposedly so.
  "The pirates were searching for gold."
• (uncountable) A deep yellow colour, resembling the metal gold.
• (countable) The bullseye of an archery target.
  "Daniel hit the gold to win the contest."

adj

• (of commercial services) Premium, superior.
• (academia) Subject to or involving a model of open access in which a published article is immediately available for to read for free with no embargo period.
  "Coordinate term: green"

adj

• (programming, of software) In a finished state, ready for manufacturing.
  "The Company confirmed that Half-Life 2, developed by Valve Software, has gone gold with a planned retail street date of November 16, 2004."