1
a piece of outerwear
outerwear 常作不可数名词；表示“一件外衣”时用 a piece of outerwear。
He carried a piece of outerwear in case it got cold.
他带了一件外衣，以防天冷。
外衣；外套
先理解核心含义，再看它在真实句子里的用法。
外衣；外套
clothing worn outdoors
He carried a piece of outerwear in case it got cold.
他带了一件外衣，以防天冷。
外衣；穿在内衣外的衣物(如连衣裙)
Clothing (such as a dress) worn over one's underwear.
户外外衣(如雨衣)；外套
Clothing (such as a raincoat) worn over one's clothes when outdoors.
Before going skiing, make sure you have warm outerwear.
去滑雪之前，确保你有保暖的外衣。
The store sells outerwear such as coats, jackets, and raincoats.
这家店出售外套、夹克和雨衣等外衣。
She checked the weather forecast to decide what outerwear to bring.
她查了天气预报来决定带什么外衣。
outerwear 常作不可数名词；表示“一件外衣”时用 a piece of outerwear。
He carried a piece of outerwear in case it got cold.
他带了一件外衣，以防天冷。
as outerwear 表示“作为外衣（穿）”，强调用作外衣的用途。
She wore a light cardigan as outerwear.
她把一件薄开衫当外衣穿。
Not this
I bought an outerwear for the winter trip.
Use this
I bought outerwear for the winter trip.
outerwear 是不可数名词，不能直接用 a/an 修饰。可以说 a piece of outerwear 或直接说 outerwear 表示泛指。
Not this
My outerwear are all in the closet.
Use this
My outerwear is all in the closet.
outerwear 是不可数名词，谓语动词应用单数 is，而不能按可数名词用 are。
Focus on the distinctions below. Other candidates are kept compact until a reliable usage note is available.
冬季外衣；冬装
She bought new winter outerwear before the trip.
旅行前她买了新的冬季外衣。
防水外衣
Waterproof outerwear is essential for hiking in the rain.
在雨中徒步旅行时，防水外衣是必需的。
男式外套
The store has a wide selection of men's outerwear.
这家商店有各式各样的男式外套。
外套系列
The designer's latest outerwear collection features bold colors.
这位设计师最新的外套系列以鲜艳的色彩为特色。
轻便外衣
Pack some lightweight outerwear for the cool evenings.
带几件轻便外衣，以防夜晚降温。
厚实的外衣
Heavy outerwear is needed in freezing temperatures.
严寒天气需要厚实的外衣。
Use outerwear naturally, then get feedback on meaning, tone, grammar, and phrasing.
Revisit a common error or keep this word in your review list.
outer（外面）+wear（穿）→ 穿在外面的衣服，即外套、外衣。联想：出门时最外层穿的那件就是 outerwear。
语域：neutral 常见场景：retail、shopping、product descriptions “outerwear” 属于中性语域，通常用于商品分类、购物或概括性描述；日常会话中也能自然使用，但不带有正式或随意的明显色彩。
这些词都以 -wear 结尾，词尾均读作 /weə(r)/，和 outerwear 的词尾发音相同；但重音都在各自的第一个音节上，所以它们与 outerwear 并不构成完整押韵（仅词尾音相同）。注意不要将 -wear 与 weather /ˈweðə(r)/ 混淆，后者拼写相似但发音不同。
Dictionary facts from ECDICT, WIKTIONARY.