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Definition of jillion

jillion

/ˈdʒɪl.jən/
jil · lion
Plural:jillions
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jillion Lexical Profile

jillion Game Scores & Validity

• noun

1

An unspecified, extremely large, or indeterminately vast number or amount (used informally for hyperbolic emphasis).

Example

"After being away from her desk for a week, she returned to find a jillion unread messages waiting in her inbox."

Synonyms
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Antonyms
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• Rhymes for jillion

• Nearby Words

jihadism
jihadist
jill
jillion
jillionth
jilt
jim jim

Word Origin & Etymology

Coined in mid-20th-century American English by combining an arbitrary initial consonant with the ending of 'million', 'billion', and 'trillion' to suggest an unimaginably large number.

Cite this Entry

Wordmom. (2026). Definition of Jillion. In Wordmom Dictionary. Retrieved Nov 5, 2026, from https://wordmom.com/dictionary/jillion
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