Eight and one more; one less than ten; as, nine miles.

The number greater than eight by a unit; nine units or objects.

the cardinal number that is the sum of eight and one

denoting a quantity consisting of one more than eight and one less than ten

A group of nine people; as, the New York nine (a baseball team).

a team of professional baseball players who play and travel together; "each club played six home games with teams in its own division"

Nine is a musical play with a book by Arthur Kopit and music and lyrics by American composer Maury Yeston.

Nine (real name: D. Keyes) is a rapper from New York and protege of DJ Funkmaster Flex, whom enjoyed moderate success in the 1990s. Known for the popular singles "Any Emcee" and "Whatchu Want", Nine got his big break in late 1993 as a featured guest on Funkmaster Flex and the Ghetto Celebs' "Six Million Ways to Die."

A symbol representing nine units, as 9 or ix.

a measure of reliability, or "availability," used in computer engineering. For example, a component has "3 nines" of reliability if it operates correctly 99.9% of the time, or, equivalently, if its failure rate is 0.1%. Thus each nine represents a reduction of 90% in the failure rate. If the probability of correct operation is , then the reliability, in nines, is equal to -log10(1-).

A Celtic sacred number which represents the beginning and ending of all things.