The word 'pajamas' — spelled 'pyjamas' in British English — preserves within its syllables the entire geography of colonial trade and cultural borrowing that defined the nineteenth century. It is a Persian compound adopted into Hindustani, borrowed by British colonists in India, carried back to Britain as the name of a new fashion, and then exported to the English-speaking world as one of the most familiar items of domestic life.
The Persian elements are transparent: 'pāy' (پای) means 'leg' or 'foot,' and 'jāma' (جامه) means 'garment,' 'robe,' or 'clothing.' The compound 'pāyjāma' therefore means simply 'leg garment' — a descriptively accurate name for loose trousers tied at the waist. Persian was the prestige literary and administrative language of the Mughal Empire, and its vocabulary permeated the Hindustani spoken across South Asia; 'pāyjāma' passed into Hindi and Urdu, where it referred to lightweight cotton or silk trousers worn by men and women across a wide swath of South Asian, Central Asian, and Middle Eastern cultures.
British soldiers, merchants, and colonial administrators arriving in India from the seventeenth century onwards encountered the garment and quickly recognized its advantages in the subcontinent's climate. By the late eighteenth and early nineteenth centuries, British men in India were wearing 'paejamas' (as the word was sometimes spelled) as informal indoor wear and, increasingly, as nightwear. The garment was ideally suited for sleeping: loose, lightweight, and cool. The Anglo-Indian community developed a range of hybrid practices around dress
The first recorded use in an English-language text dates to around 1800, though the garment was certainly in use by British colonists before that. The word appears in various spellings — 'paijama,' 'pyjama,' 'pajama' — reflecting the difficulty of standardizing a Hindustani loan into English orthography. By the mid-nineteenth century, the garment and the word had made the journey back to Britain, where 'pyjamas' (the British spelling, possibly influenced by attempts to render the 'ā' of the source language) became fashionable nightwear. American English settled
The cultural transformation of the garment is striking. In South Asia, 'pāyjāma' was everyday clothing worn at all hours — a garment of versatility and dignity, part of the Mughal courtly wardrobe as well as ordinary dress. In Britain and America, it became specifically and almost exclusively nightwear — something worn in private, associated with sleep, domesticity, and informality. This narrowing of function reflects the borrowing culture's particular interest in the garment: British colonists adopted it for sleeping because it was comfortable and unlike anything in the Western nightwear tradition, but they did not adopt it for daily public wear, where European tailored clothing remained the standard.
The twentieth century saw 'pajamas' expand again, this time into loungewear — garments worn at home, at leisure, or even in semi-public contexts. 'Pajama days,' silk pajama sets worn as fashion statements, and the 'athleisure' blurring of sleepwear and daywear all participate in a cultural shift that, ironically, brings the Western use of pajamas closer to the original South Asian model of a versatile everyday garment.
The word also spawned compounds: 'pajama party' (a sleepover), 'pajama top,' 'pajama bottoms.' In the phrase 'the cat's pajamas' — 1920s American slang for something excellent or admirable — the garment appears as a marker of comfort, luxury, and sophisticated ease. The phrase has faded, but 'pajamas' remains one of the most securely lodged Hindustani loanwords in English, a daily reminder of the Persian lexical layer that shaped Mughal India and, through it, the English-speaking world.