Noun
Sunday best (uncountable)
(idiomatic) A person's finest clothing, especially the clothes one reserves to wear to church on Sunday.
Sunday-best (uncountable)
Alternative spelling of Sunday best
Sunday-best
I don't put on my best clothes to make a film, my Sunday best. Jonathan Glazer
He advised listeners to put on their Sunday best, drive to their churches, and stand on the front porch to watch online services there, rather than “sit at home in my PJs and act lazy and talk about things while the preacher is preaching.” Source: Internet
Take your Sunday best and do like chef Emeril Lagasse: kick it up a notch. Source: Internet
My parents told me when they visited a quarter of a century ago it felt like a 1950s time warp: men wore their Sunday best to dinner, everyone went to church and children played out in the streets. Source: Internet
This warm comedy is laced with drama and punctuated with plenty of sight gags, including Main roller-skating in her Sunday best and the three stars tangling with a disgruntled bear on a camping trip. Source: Internet
I stole a glance of my future in-laws, dressed in their Sunday best. Source: Internet