shift

Jennifer WeinerのFly Away Homeを読んでいます。
"So you're rich?" Ceil had asked, in her guileless way.
Sylvie winced. Ceil's mother, elegant and blond in a Lilly Pulizer shift and pearls, and her blue-eyed dad, who'd worn a cotton sweater tied around his shoulders, had just left the dorm, looking as if they were on their to lunch at the country club.
上に出てきた "shift" は私の知らない意味に違いありません。辞書を引きます。
・Oxford English Dictionary: A woman's straight unwaisted dress.: The girl changed her dress into a simple shift and checked the hall way for any lingering servants.
・Collins Dictionary: a loose dress that hangs straight with no waistline
・Cambridge English Dictionary: a simple dress that hangs straight from the shoulders
なるほど、そうするとLilly Pulizerは女性なら知っていそうなブランド名ですね。