What does "dressed to the nines" mean?

Very fancily or formally dressed; wearing very showy or splendid clothing.

What is a synonym for "dressed to the nines"?

Common synonyms include: dolled up, dressed, dressed to kill, dressed-up, spiffed up, spruced up.

adj

adj ·Rare ·Advanced level

Adjective

1
Very fancily or formally dressed; wearing very showy or splendid clothing. idiomatic, not-comparable
"He arrived at the gala, dressed to the nines in his top hat and tails."

Adjective

"He arrived at the gala, dressed to the nines in his top hat and tails."

From dressed + to the nines; first recorded in the 1800s.