Vest

A man wearing an American vest on top of a shirt (in Britain this is called a jumper)
A man wearing a British vest
The Simple English Wiktionary has a definition for: vest.

A vest is a kind of clothing. It is worn on the upper part of the body. It has no sleeves.[1]

In the United States and American English, a vest is a kind of clothing sometimes worn on top of a shirt.[2]

In Britain and British English, a vest is a kind of clothing worn over the chest and below all other clothes on that part of the body.

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References

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  1. ↑ "Definition of VEST". www.merriam-webster.com.
  2. ↑ "Types of Men's Vests".