Platinum (noun)

1. A precious metal, silver-white in color, occurring in some nickel and copper ores.
2. A record, album, or other product that has sold a specified number of copies and therefore qualifies for a platinum award.
3. A credit card, membership program, or other premium service that offers exclusive benefits and privileges.
4. A standardized form of high-level disinfection for medical and dental instruments.
5. A chemical element with the atomic number 78, a dense, silvery-white metal that is resistant to corrosion and oxidation.

Origin:

Mid 17th century: from spanish platina, literally "little silver", diminutive of plata "silver".

Examples:

1. Platinum is one of the rarest and most valuable metals, used for jewelry and coins.
2. The album has gone platinum, with over a million copies sold.
3. The platinum card offers exclusive perks, such as airport lounge access and concierge services.
4. The platinum disinfection process is essential for preventing the spread of infection in medical settings.
5. Platinum is a chemical element that is widely used in catalytic converters, electronic components, and dental fillings.