trillion

A trillion is 1,000,000,000,000, also known as 10 to the 12th power, or one million million. It’s such a large number it’s hard to get your head around it, so sometimes trillion just means “wow, a lot.”

A trillion is bigger than a million, more than a billion, it’s 1,000,000,000,000 (and even or 1,000,000,000,000,000,000 in some countries). (Yes, those are 18 zeroes in that last one.) Either way, this is such a large number that it's hard to imagine. Maybe that's why people often use this word in a looser sense, as in "I have a trillion reasons why I like this band!" That meaning is similar to gazillion, bazillion, and zillion, which aren't real numbers.

Definitions of trillion
  1. noun
    the number that is represented as a one followed by 12 zeros
    “in England they call a trillion a billion”
    synonyms: 1000000000000, one million million
    see moresee less
    type of:
    large integer
    an integer equal to or greater than ten
  2. noun
    the number that is represented as a one followed by 18 zeros
    “in England they call a quintillion a trillion
    synonyms: one million million million
    see moresee less
    type of:
    large integer
    an integer equal to or greater than ten
  3. noun
    a very large indefinite number (usually hyperbole)
    synonyms: billion, gazillion, jillion, million, zillion
    see moresee less
    type of:
    large indefinite amount, large indefinite quantity
    an indefinite quantity that is above the average in size or magnitude
  4. adjective
    one million million in the United States
    Synonyms:
    cardinal
    being or denoting a numerical quantity but not order
  5. adjective
    one quintillion in Great Britain
    Synonyms:
    cardinal
    being or denoting a numerical quantity but not order
Word Family
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