Pyjamas vs. Jammies — What's the Difference?

A loose-fitting jacket and trousers for sleeping in

Plural of jammy

Variant of pajama.

(slang) pajamas/pyjamas

Standard spelling of pajamas.

Loose-fitting nightclothes worn for sleeping or lounging; have a jacket top and trousers

Standard spelling of pajamas.

A garment, similar to the Oriental pyjama (which see), adopted among Europeans, Americans, and other Occidentals, for wear in the dressing room and during sleep; also, a suit of drawers and blouse for such wear.

Lightweight trousers worn in various Eastern countries

Loose-fitting nightclothes worn for sleeping or lounging; have a jacket top and trousers