Meaning of “platinum” in the English Dictionary

"platinum" in American English

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platinumnoun [ U ]

us /ˈplæt·ən·əm/

a valuable metal that is silver in color, does not react easily with other elements, and is used in jewelry and in industry

(Definition of “platinum” from the Cambridge Academic Content Dictionary © Cambridge University Press)

"platinum" in Business English

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platinumnoun [ U ]

uk /ˈplætɪnəm/ us /ˈplætənəm/

STOCK MARKET, NATURAL RESOURCES a very valuable silver-grey metal that is used in industry and often traded on the commodity market:

Platinum rose to $1,293.50 an ounce after hitting a record $1,298.50 during the day's trading.

(Definition of “platinum” from the Cambridge Business English Dictionary © Cambridge University Press)