onesie

/ˈwʌnzi/ (bre, ipa) · /ˈwʌnzi/ (ame, ipa) · /ˈwən-zē/ (ame, mw)

onesie — noun

  • onesiesingular
  • onesiesplural

1. a soft one-piece garment for a baby, with a fastening underneath so the body sta

1.名詞B2
釋義

a soft one-piece garment for a baby, with a fastening underneath so the body stays covered during changing.

例句

Trang packed six cotton onesies before the family trip to Tainan.

pack + number + onesies

The nurse showed Felix how to fasten the baby's onesie after changing him.

fasten + baby's onesie

同義詞
  • bodysuit

    more neutral retail term; often used in product descriptions rather than everyday family talk

  • babygrow

    common British word for similar baby clothing

  • romper

    can overlap, but often suggests a looser one-piece outfit rather than a close-fitting basic layer

文法句型

baby onesie

cotton onesie

fasten a onesie

用法筆記

This sense usually refers to baby clothing worn as a base layer or everyday outfit. A onesie normally closes underneath, which makes diaper changes easier than with separate tops and trousers.

常見錯誤

❌The baby wore a onesie and then I buttoned the trousers part.
✅The baby wore a onesie, and I fastened it underneath.
💡a onesie is one piece, not a top with separate trouser legs.

2. a loose one-piece outfit for an adult, usually worn at home for warmth, comfort,

2.名詞B2
釋義

a loose one-piece outfit for an adult, usually worn at home for warmth, comfort, or fun.

例句

Ziad wore a fleece onesie while watching films on the sofa.

wear a fleece onesie at home

Heloisa laughed when the party host arrived in a panda onesie.

arrive in + themed onesie

同義詞
  • jumpsuit

    broader and often more stylish or outdoor-friendly than a cosy home onesie

  • sleepsuit

    focuses more on sleeping than on lounging or novelty wear

  • all-in-one

    British informal term for a one-piece outfit, often used in clothing descriptions

文法句型

wear a onesie

zip up a onesie

animal-print onesie

用法筆記

This sense is informal and often suggests cosy home wear or novelty clothing, such as animal-themed outfits. It overlaps with 'jumpsuit' in shape, but a onesie usually sounds softer, more playful, and less suitable for outdoor or formal settings.

常見錯誤

❌She changed into a onesie suit after dinner.
✅She changed into a onesie after dinner.
💡the word already means a one-piece outfit, so adding 'suit' is unnecessary.