Separate names with a comma.
a cardinal number, eight plus one.
a symbol for this number, as 9 or IX.
a set of this many persons or things
a baseball team.
a playing card with nine pips.
the Nine, the Muses.
amounting to nine in number.
dressed to the nines, looking one's best; dressed smartly, splendidly, etc.:
All the girls were dressed to the nines for the party.
Origin of nine
before 900; Middle English; Old English nigan, nigon, cognate with Dutch negen, akin to German neun, Old Norse nīu, Gothic niun, Latin novem, Greek ennéa, Sanskrit náva