8 is a composite number and the first number which is neither prime nor semiprime. By Mihăilescu's Theorem, it is the only nonzero perfect power that is one less than another …

Learn the different ways number 8 can be represented. See the number eight on a number line, ten frame, numeral, word, dice, dominoes, tally marks, fingers and picture representations.

a : an 8-oared racing boat or its crew b : an 8-cylinder engine or automobile eight adjective eight pronoun, plural in construction

4 days ago · A West Arabic numeral, ultimately from Indic numerals (compare Devanagari ८ (8)). See 8 § Evolution of the Arabic digit for more.

"8." Vocabulary.com Dictionary, Vocabulary.com, https://www.vocabulary.com/dictionary/8. Accessed 18 Nov. 2025. Copy citation Examples from books and articles

"Section 8" is common U.S. slang for "crazy," based on the U.S. military's Section 8 discharge for mentally unfit personnel. In China, "8" is used in chat speak as a term for parting.

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Learn eighth grade math—functions, linear equations, geometric transformations, and more. (aligned with Common Core standards)

0:01 Pronunciation of the number 8 The number eight is a natural number that comes after the number seven and before the number nine. In Roman numerals, it is VIII.

The symbol 8 by itself represents a quantity of eight. The symbol is also used as a digit which forms part of a number.