The digit or figure 9.
A playing card with nine pips.
A baseball club, team, or lineup (composed of nine players).
A nine-millimeter semi-automatic pistol.
A statistical unit of proportion (of reliability, purity, etc.).
Describing a group or set with nine elements.
A numerical value equal to 9; the number following eight and preceding ten.
Something nine inches long.
Used instead of nine in radio communications to avoid confusion with five and nein.