nine

The digit or figure 9.

A playing card with nine pips.

A nine-millimeter semi-automatic pistol.

(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.”

A baseball club, team, or lineup (composed of nine players).

A numerical value equal to 9; the number following eight and preceding ten.

Describing a group or set with nine elements.

“A cat has nine lives.”