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We found 22 dictionaries with English definitions that include the word septillion: Click on the first link on a line below to go directly to a page where "septillion" is defined. General (19 matching dictionaries) septillion: American Heritage Dictionary of the English Language [home, info] septillion: Collins English Dictionary [home, info] septillion: Vocabulary.com [home, info] septillion: Merriam-Webster's Online Dictionary, 11th Edition [home, info] septillion: Wordnik [home, info] Septillion: Wiktionary [home, info] septillion: Webster's New World College Dictionary, 4th Ed. [home, info] septillion: The Wordsmyth English Dictionary-Thesaurus [home, info] septillion: Infoplease Dictionary [home, info] septillion: Dictionary.com [home, info] Septillion: Wikipedia, the Free Encyclopedia [home, info] Septillion: Online Plain Text English Dictionary [home, info] septillion: Webster's Revised Unabridged, 1913 Edition [home, info] Septillion: AllWords.com Multi-Lingual Dictionary [home, info] septillion: Hutchinson's Dictionary of Difficult Words [home, info] septillion: Free Dictionary [home, info] septillion: Hutchinson Dictionaries [home, info] septillion: Mnemonic Dictionary [home, info] septillion: Dictionary/thesaurus [home, info] Computing (2 matching dictionaries) septillion: CCI Computer [home, info] septillion: Encyclopedia [home, info] Science (1 matching dictionary) Septillion: Eric Weisstein's World of Mathematics [home, info]

Quick definitions (septillion) (n.) According to the French method of numeration (which is followed also in the United States), the number expressed by a unit with twenty-four ciphers annexed. According to the English method, the number expressed by a unit with forty-two ciphers annexed. See Numeration. (This definition is from the 1913 Webster's Dictionary and may be outdated.)