platinum

noun

1. (countable, uncountable)The chemical element with atomic number 78 and symbol Pt; a dense, malleable, ductile, highly unreactive, silverish-white transition metal of great value.
2. (countable, uncountable)A whitish grey colour, like that of the metal.
3. (countable)A single or album that has achieved platinum sales, i.e. over 1 million or 2 million.
4. (countable, ellipsis, sometimes)A platinum-based drug: a platin.

adj

1. (not-comparable)Of a whitish grey colour, like that of the metal.
2. (not-comparable)Of a musical recording that has sold over one million copies (for singles), or two million (for albums).
3. (not-comparable)Very expensive, or of very high quality

   “We can offer the platinum service for fifty dollars extra.”

verb

1. To attain all of the achievements in a game (originally on certain PlayStation consoles, now colloquially used regardless of platform).

   “I platinumed in Clash of Clans yesterday.”