Something that is out of style was once popular but is no longer so.

"Out of style"是指某物曾经一时流行，但是不再流行了。

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People also often backlash against once popular names - these names too, must know what it's like to be Britney.

人们也不喜欢曾一度非常流行的名字，那些叫Britney(布兰妮)的人是深有体会。

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A study in the Journal of the American Dietetic Association suggests that parents stop teaching their children the once popular cardinal rule of the dinner table, ” clean your plate, eat it all”.

当孩子的身体告诉他他已经吃饱了的时候，不要强迫你的孩子继续吃下去。 发表在《美国饮食协会杂志》上的一项研究报告表明，家长们不应该再让孩子记住那条曾经的主流餐桌规定——“不许剩饭！”

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He knows it once saw brighter days. "Overtown was a popular,healthy, wonderful place to live."

VOA: standard.2010.03.10

Pakistan launched a major offensive in and around Swat in late April to check the Taliban advances in the northwestern mountainous valley, once a popular tourist resort.

VOA: standard.2009.09.11

"And so once we understand the genetics, we can try and just take those particular genes and work with popular varieties of rice to cross those particular genes into a popular variety and still maintain the expected cooking and eating qualities of the grain."

VOA: standard.2010.06.25

American business schools were once popular places to send promising young sararimen, and hundreds enrolled from big Japanese firms every year.

ECONOMIST: Business studies in Japan

Perhaps everyone that was expecting this retailer to share the same fate as the once popular movie rental provider Blockbuster have it wrong.

FORBES: Is Gamestop Getting Its Game Back?

Hernandez's lawyer said the once popular mayor, who ran a small grocery store in Bell, was unschooled and not one who understood the city's finances.

NPR: Ex-Officials Convicted In Calif. Corruption Case