Googolplex

/ˈɡuːɡəlplɛks/ num

num ·Uncommon ·Advanced level

Meaning at a glance

  • Primary sense: a cardinal number represented as 1 followed by a googol of zeros (ten raised to the power of a googol)
  • Grammar: googolplex is listed as num.
  • Nearest alternatives: astronomical, astronomical figure, astronomical number, billion.
  • Useful contrasts: cautious, conventional, finite.
  • Usage evidence: What is the largest prime number smaller than a googolplex?

How to use "googolplex"

  1. Start with the primary definition, then check the part of speech before placing the word in a sentence.
  2. Compare nearby synonyms to make sure "googolplex" carries the exact meaning, tone, and strength you need.
  3. Use the example sentence as a context check. If your sentence uses the word differently, confirm that the grammar still fits.

Meaning check

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  • Does it match the intended tone rather than only the dictionary definition?
  • Would a simpler synonym be clearer for the reader?
  • Is there enough surrounding context to prevent ambiguity?

Source and review context

This entry combines structured lexical data with WordToolSet review checks. Definitions, examples, synonyms, and usage notes may come from different source tables, so the page is designed to show evidence from more than one angle before you rely on "googolplex" in a final draft.

If a word has several senses, prefer the sense that matches your sentence's grammar and surrounding context. A correct definition can still be the wrong choice when the sentence needs a different register, emphasis, or level of specificity.

Before you rely on this definition

Read the first definition as a starting point, then check the example, synonyms, and part of speech before treating "googolplex" as the right word for your sentence.

If your draft is formal, technical, persuasive, or sensitive, compare "googolplex" with a nearby alternative so the final choice matches both meaning and reader expectation.

Compare nearby meanings

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  • Use antonyms to check the boundary of the meaning and avoid accidental contrast.
  • Use the example sentence to confirm the word behaves naturally in context.
  • Keep the original wording when a replacement adds complexity without improving precision.

Definition decision workflow

1. Identify the role

Check whether "googolplex" is acting as num in your sentence. A definition is only useful when the grammar matches the way the word is being used.

2. Test the nearest option

Compare it with "astronomical" and other nearby choices to see whether the sentence needs a softer, stronger, or more familiar word.

3. Confirm with context

Use the example sentence below as an evidence check, then read your own sentence out loud to catch tone or rhythm problems.

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Final meaning check

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When the definition, synonym evidence, and example context point in the same direction, the word is usually a safer choice. When they conflict, revise the sentence or choose a clearer alternative.

Definitions

Noun
  1. 1
    a cardinal number represented as 1 followed by a googol of zeros (ten raised to the power of a googol) wordnet
Numeral
  1. 1
    The number 10^(10¹⁰⁰) or 10^( text )googol, ten to the power of a googol.

    "The name "googol" was invented by a child (Dr. Kasner's nine-year-old nephew) who was asked to think up a name for a very big number, namely, 1 with a hundred zeros after it. He was very certain that this number was not infinite, and therefore equally certain that it had to have a name. At the same time that he suggested "googol" he gave a name for a still larger number: "Googolplex." A googolplex is much larger than a googol, but is still finite, as the inventor of the name was quick to point out. It was first suggested that a googolplex should be 1, followed by writing zeros until you got tired. This is a description of what would happen if one actually tried to write a googolplex, but different people get tired at different times and it would never do to have [Primo] Carnera a better mathematician than Dr. [Albert] Einstein, simply because he had more endurance. The googolplex then, is a specific finite number, with so many zeros after the 1 that the number of zeros is a googol. A googolplex is much bigger than a googol, much bigger than a googol times a googol. A googol times a googol would be 1 with 200 zeros, whereas a googolplex is one with a googol of zeros. You will get some idea of the size of this very large but finite number from the fact that there would not be enough room to write it, if you went to the farthest star, touring all the nebulae and putting down zeros every inch of the way."

  2. 2
    A countable number. figuratively

    "Inflationary theory suggests that the entirety of space is vastly larger. Quantum theory suggests that there are many different copies of space of the same basic kind as ours (same laws of physics). String theory further suggests that there may be many different kinds of space. This whole collection of googolplexes of galaxies within each of googolplexes of different spaces within each of googols of kinds of space makes up an enormously vast universe or multiverse."

  3. 3
    An infinitesimally small portion of land, defined for legal purposes. US, nonstandard, rare

    "To a mathematician, a googolplex is the figure 1 followed by a googol of zeroes (a googol being the figure 1 followed by a mere 100 zeroes). To a real-estate man, it's one infinitesimal parcel of a plot of land."

Synonyms

All synonyms
astronomicalastronomical figureastronomical numberbillioncolossalextreme descriptor

Antonyms

Example

"What is the largest prime number smaller than a googolplex?"

Common questions

What does "googolplex" mean?

a cardinal number represented as 1 followed by a googol of zeros (ten raised to the power of a googol)

What is a synonym for "googolplex"?

Common synonyms include: astronomical, astronomical figure, astronomical number, billion, colossal, extreme descriptor.

How do you use "googolplex" in a sentence?

What is the largest prime number smaller than a googolplex?

How do you pronounce "googolplex"?

Pronounced /ˈɡuːɡəlplɛks/.

Etymology

From googol + -plex, coined by American mathematician Milton Sirotta in 1920 who was then the young nephew of mathematician Edward Kasner. First published and defined in the book Mathematics and the Imagination (1940).

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