What does whilst mean?
Whilst is a formal, chiefly British English word meaning “during the time that” or “while.” As a conjunction, it introduces a subordinate clause, as in “She waited whilst the train arrived.” As a preposition, it can occur before an -ing phrase, as in “Whilst travelling, she collected examples of regional speech.” Its conservative register gives it a literary, traditional, or occasionally ironic tone, while its long consonant cluster can make it sound more emphatic than “while.” The word remains fully understood in British English and is recognizable in American English, although “while” is much more common and neutral in everyday use. Because whilst and while differ chiefly in form and register rather than meaning, choosing whilst can introduce formality or stylistic contrast without altering the basic relationship expressed by the sentence. It also illustrates how English can preserve an older alternative after a shorter form has become dominant.
Used to introduce a subordinate clause meaning “during the time that” or “while.”
"The storm continued throughout the night whilst the repair crews worked by torchlight."
This is the principal modern use of whilst and is especially associated with formal British English.
Used before an -ing phrase with the meaning “during the time when.”
"Whilst waiting at the station, he noticed a small bookshop across the road."
This use is particularly associated with British English and is less common in American English.
Whilst is “while” with a distinctly old-fashioned flourish: same meaning, but a more emphatic and traditionally British sound.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Where does whilst come from?
Whilst developed from the older form whiles, which was used in Middle English and ultimately derived from Old English hwīl, meaning “a time” or “period.” The final -s reflects an older adverbial formation and was retained in whilst even as it disappeared from while. Related older forms such as whiles and whilest preserve the same Middle English base.
How whilst is actually used
Whilst has a formal, literary, or occasionally ironic register. Its conjunction use introduces a subordinate clause, while its preposition use is especially associated with an -ing phrase; many contemporary writers instead use while for a more neutral effect.
Easily confused with whilst
While and whilst share the same core meaning, but whilst is chiefly a formal British variant, whereas while is standard in everyday British and American English.