A onesie is a comfortable piece of clothing that covers the body, the arms, and the legs in one piece — no separate shirt and trousers. You pull it on (or zip it up) and you are dressed.

A onesie是 is a comfortable piece of clothing that covers the body, the arms, and the legs in one piece是一件連身、把身體、手臂、和腿都包在一起的舒適衣服 — no separate shirt and trousers不是分開的上衣和褲子。You你 pull it on (or zip it up)把它套上（或拉上拉鍊） and you are dressed就穿好了。

The name started as a brand: Gerber called baby suits Onesies, and people began using onesie for the thing itself.

The name這個名字 started as a brand最初是個品牌: Gerber Gerber called baby suits Onesies把嬰兒服叫做Onesies, and people後來人們 began using onesie for the thing itself就開始用onesie來稱呼這種衣服本身。

For a baby, it is often a soft cotton suit with snaps at the bottom, so you can change a nappy without taking the whole thing off. For an adult, it is usually loungewear: a zip-up suit you might wear on the sofa all Sunday, sometimes with a hood, sometimes made to look like an animal.

For a baby給嬰兒穿的, it它 is often a soft cotton suit with snaps at the bottom通常是底部有扣子的柔軟棉質衣服, so you can change a nappy without taking the whole thing off這樣換尿布時不用整件脫掉。For an adult給大人穿的, it它 is usually loungewear通常是居家服: a zip-up suit you might wear on the sofa all Sunday一件你可能整個星期天窩在沙發上穿的拉鍊連身服, sometimes with a hood有時候有連帽, sometimes made to look like an animal有時候做成動物的樣子。

Though actually, shops are messy here. In some places a baby "onesie" is only a bodysuit: it covers the body and arms, but the legs are bare. The long version that covers the legs may be called a sleeper or footie instead.

Though actually不過事實上, shops是 are messy here在這件事上說法很亂。In some places在有些地方, a baby 「onesie」嬰兒的onesie is only a bodysuit只是連身內衣: it它 covers the body and arms只包住身體和手臂, but the legs are bare但腿是露出來的。The long version that covers the legs包住腿的長版 may be called a sleeper or footie instead可能反而叫做sleeper或footie。

The dictionary picture — arms and legs all in — is truest of the adult suit and of long baby ones. The word is informal.

The dictionary picture字典上的畫面 — arms and legs all in手臂和腿都包住的樣子 — is truest of the adult suit and of long baby ones最符合大人的連身服和長版的嬰兒款。The word這個字 is informal是口語用字。