What’s the difference between trousers and pants?

In British English, trousers (or “a pair of trousers”) is the noun used for the item of clothing commonly called pants in American English. In British English, pants refers to underwear (and is short for “underpants”).

So, when referring to pyjamas or pajamas, British English speakers would say “pyjama trousers,” while American English speakers would say “pajama pants.”

The QuillBot Grammar Checker has selectable grammar regions, so you can always be sure you are using trousers or pants correctly in your writing.