C1conjunctionformal10K+

Whilst

UK /["/waɪlst/"]/US /["/waɪlst/"]/

Definition

during the time that something is happening; at the same time as something else is happening

In simple words: At the same time as; during.

Examples

  • In the UK it is illegal to drive whilst holding a mobile phone.
  • Harrison's clock allowed seamen to keep time accurately whilst at sea.
  • Whilst my brother is hard-working, I'm quite lazy.
  • Whilst the results of this study are certainly interesting, they are far from conclusive.

Usage notes

Use 'whilst' in more formal writing or speech. It's less common in everyday conversation, where 'while' is preferred. Avoid using 'whilst' in informal contexts.

Grammar pattern

whilst + clause

Memory hint

Think of 'whilst' as 'while' with a twist, like a dance while talking.

Collocations

  • whilst studying
  • whilst waiting
  • whilst driving

Synonyms

  • when

Antonyms

  • instead
  • subsequently

Common mistakes

  • Using 'whilst' in informal conversations.
  • 'Whilst' not used properly with clauses.