nine

Etymology

From Middle English nyne, nine, from Old English nigon, from Proto-West Germanic *neun, from Proto-Germanic *newun, from Proto-Indo-European *h₁néwn̥.

num

1. A numerical value equal to 9; the number following eight and preceding ten.
2. Describing a group or set with nine elements.
   A cat has nine lives.

noun

1. The digit or figure 9.
2. (card games) A playing card with nine pips.
3. (weaponry) A nine-millimeter semi-automatic pistol.
4. (computing, engineering, usually in the plural) A statistical unit of proportion (of reliability, purity, etc.).
   They guaranteed that our Web site would have 99.99% uptime, or four nines.
5. (baseball) A baseball club, team, or lineup (composed of nine players).
   The St. Louis club is the only nine in the league which gives its patrons the right to see a full game or no pay. 1877, Chicago Times, July 8, 1877