Wiktionary
a. (context idiomatic English) Very fancily or formally dressed; wearing very showy or splendid clothing.
WordNet
adj. dressed in fancy or formal clothing [syn: dressed(p), dressed-up, dressed to the nines(p), dressed to kill(p), dolled up, spruced up, spiffed up, togged up]
Usage examples of "dressed to the nines".
They were dressed to the nines, all of them, and Lachley was leading them straight toward the East End, where gentlemen in fancy dress coats and ladies in silk evening gowns would stand out like beacon fires, inviting attack by footpads.
All of varying hues and dressed to the nines, so confident and cocky that they hadn't even worn good battle shoes….
She stared at this predator that had on a black soft-structured linen suit, black T-shirt, dressed to the nines….
All of them were dressed to the nines, and were looking almighty fancy.
It was an Upper East Side crowd, for sure: ladies dressed to the nines clicking here and there in high heels, uniformed schoolchildren lined up and well behaved, a few tweedy-looking academics wandering about with thoughtful faces.
He was as dapper as ever, dressed to the nines, busy unwrapping one of his long cigars.
She was seated with a half dozen other people on folding chairs, all of them dressed to the nines, which didn't make a whole lot of sense for a radio show.
For all the daze he appeared to display at the effect of the girls, more of whom had drifted in, all dressed to the nines as they found out that the negotiations were going on, he read the contract carefully.
Then he'd ride into Goriah dressed to the nines in his gorgeous Muromachi Period samurai armor, with his sword at present-arms.
One night he would go out looking like a vagrant, the next night, he'd be dressed to the nines.