Pronunciation: /kwɪnˈtɪljən/
noun a cardinal number represented in the U.S. by 1 followed by 18 zeros, and in Great Britain by 1 followed by 30 zeros.
A1 A quintillion is a very large number.
A2 The concept of a quintillion can be difficult to grasp.
B1 Scientists often use quintillion to describe astronomical distances.
B2 The national debt is in the quintillions of dollars.
C1 The estimated number of stars in the universe is in the quintillions.
C2 The probability of winning the lottery is often described as one in a quintillion.
formal The national debt has reached over a quintillion dollars.
informal I heard that company is worth a quintillion bucks!
slang That car must have cost a quintillion smackaroos.
figurative Her patience seemed to stretch on for a quintillion years.
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