whilst /waɪlst/conjunction 6adverb 1 conjunction6 •(UK, Commonwealth) During the whole, or until the end, of the time that; as long as, at the same time.Drivers must switch off engines whilst on stand. •(UK, Commonwealth) Within, or before the end, of the time that. •(UK, Commonwealth) Although; in contrast; whereas.His company must do his minions grace, / Whil'st I at home starue for a merrie looke: / Hath homelie age th'alluring beauty tooke / From my poore cheeke? — 1594 •(UK, Commonwealth) Synonym of while. •(UK, Commonwealth) Besides; in addition.Modern engine sheds of advanced design have also been built at Radyr, Abercynon, and elsewhere, whilst other depots have been remodelled and re-equipped. — 1939 •(UK, Commonwealth) Only if; provided that; as long as; so long as. adverb1 •Often preceded by the: During the time; meanwhile.Nay, I prethee put on this gown, & this beard, make him beleeue thou art sir Topas the Curate, doe it quickly. Ile call sir Toby the whilst. — 1601
