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- DictionaryQuad·ril·lion/kwäˈdrilyən/
cardinal
- 1. a thousand raised to the power of five (1015).
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What is the definition of quadrillion?
Learn the meaning of quadrillion, a number with 15 or 24 zeros, and see examples of its usage in sentences. Find out the etymology, history, and related words of quadrillion in this dictionary entry.
A quadrillion is a thousand million millions, or a 1 followed by 15 zeros. Learn how to use scientific notation, prefixes, and illustrations to understand this large number.
Learn how to name and write large numbers in different systems, such as American, British, and French. Find out the value and meaning of quadrillion and other terms in powers of ten.
Value In Powers Of TenNumber Of ZerosAmerican NameBritish Name109billionthousand million or milliard1012trillionbillion1015quadrillionthousand billion1018quintilliontrillion- The Editors of Encyclopaedia Britannica
A quadrillion is a very large number, either 1 followed by 15 zeros in the U.S. or 1 followed by 24 zeros in Great Britain. Learn more about its meaning, history, and usage in sentences from Dictionary.com.
- English
- French
- Middle French
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Etymology
From French quadrillion, from quadri- (“four”) + -illion.
Pronunciation
1. (US) IPA(key): /kwɑˈdɹɪl.i.ən/, /kwɑˈdɹɪl.jən/ 2. (General Australian, Scotland) IPA(key): /kwɔˈdɹɪl.jən/ 3. (New Zealand) IPA(key): /kwɔˈdɹɘl.jɘn/ 4. (UK, Ireland, General South African) IPA(key): /kwɒˈdɹɪl.jən/, /kwɒˈdʒɹɪl.jən/ (the latter may be non-standard) 5. Rhymes: -ɪljən
Numeral
quadrillion (plural quadrillions) 1. (US, modern British and Australian, short scale) A thousand trillion (logic: 1,000 × 1,0004): 1 followed by fifteen zeros, 1015. 1.1. 2022 September 19, P. Schultheiss et al., “The abundance, biomass, and distribution of ants on Earth”, in Proceedings of the National Academy of Sciences of the United States of America, page 1, column 2: 1.1.1. Integrating data from all continents and major biomes, we conservatively estimate 20 × 1015 (20 quadrillion) ants...
Etymology
Inherited from Middle French quadrillion, from quadri- (“four”) + -illion.
Pronunciation
1. IPA(key): /kwa.dʁi.ljɔ̃/, /ka.dʁi.ljɔ̃/
Numeral
quadrillion m (plural quadrillions) 1. septillion (1024) 2. (dated) quadrillion (1015)
Quadrillion is a numeral that can mean a thousand trillion or a million trillion, depending on the scale. Learn how to say it in different languages, its etymology and synonyms.
noun [ C ] us / kwɑːˈdrɪl.jən / uk / kwɒdˈrɪl.jən / plural quadrillion or or quadrillions. Add to word list. the number 1,000,000,000,000,000: The system will be capable of more than a quadrillion calculations per second. It would be worth quadrillions of dollars today. Fewer examples.
Learn the meaning, pronunciation and usage of the word quadrillion, which is the number 1015 or 1 followed by 15 zeros. Find examples, synonyms and related words in the Oxford Advanced American Dictionary.
